Al-Mundhiri recorded the following chapter in his book Al-Targhib wal-Tarhib:

الترهيب من أذى الجار وما جاء في تأكيد حقه

Discouragement to harm the neighbor, and what has been related of affirming his rights.

Source: al-Targhīb wal-Tarhīb 3/352

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said:

مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ جَارَهُ وَمَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ ضَيْفَهُ

Whoever believes in Allah and the Last Day, let him speak goodness or remain silent. Whoever believes in Allah and the Last Day, let him honor his neighbor. Whoever believes in Allah and the Last Day, let him honor his guest.

Source: Ṣaḥīḥ al-Bukhārī 5672, Grade: Muttafaqun Alayhi

In another narration, the Prophet said:

فَلَا يُؤْذِي جَارَهُ

Let him not harm his neighbor.

Source: Ṣaḥīḥ Muslim 47, Grade: Sahih

And in another narration, the Prophet said:

فَلْيَصِلْ رَحِمَهُ

Let him uphold family ties.

Source: Ṣaḥīḥ al-Bukhārī 5787, Grade: Sahih

Al-Miqdam ibn al-Aswad reported: The Messenger of Allah, peace and blessings be upon him, said to his companions:

مَا تَقُولُونَ فِي الزِّنَا

What do you say about adultery?

They said, “Allah and his messenger have forbidden it, so it is forbidden.” The Prophet said:

لَأَنْ يَزْنِيَ الرَّجُلُ بِعَشْرَةِ نِسْوَةٍ أَيْسَرُ عَلَيْهِ مِنْ أَنْ يَزْنِيَ بِامْرَأَةِ جَارِهِ مَا تَقُولُونَ فِي السَّرِقَةِ

For a man to commit adultery with ten women is lesser against him than committing adultery with the wife of his neighbor. What do you say about theft?

They said, “Allah and his messenger have forbidden it, so it is forbidden.” The Prophet said:

لَأَنْ يَسْرِقَ الرَّجُلُ مِنْ عَشْرَةِ أَبْيَاتٍ أَيْسَرُ عَلَيْهِ مِنْ أَنْ يَسْرِقَ مِنْ جَارِهِ

For a man to steal from ten houses is lesser against him than stealing from his neighbor.

Source: Musnad Aḥmad 23342, Grade: Sahih

Abu Shurayh reported: The Prophet, peace and blessings be upon him, said three times:

وَاللَّهِ لَا يُؤْمِنُ

By Allah, he does not have faith!

It was said, “Who is it, O Messenger of Allah?” The Prophet said:

الَّذِي لَا يَأْمَنُ جَارُهُ بَوَايِقَهُ

He whose neighbor is not safe from his harm.

Source: Ṣaḥīḥ al-Bukhārī 5670, Grade: Sahih

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said:

لَا يَدْخُلُ الْجَنَّةَ مَنْ لَا يَأْمَنُ جَارُهُ بَوَائِقَهُ

He will not enter Paradise whose neighbor is not secure from his evil.

Source: Ṣaḥīḥ Muslim 46, Grade: Sahih

Anas ibn Malik reported: The Prophet, peace and blessings be upon him, said:

مَا هُوَ بِمُؤْمِنٍ مَنْ لَمْ يَأْمَنْ جَارُهُ بَوَائِقَهُ

He is not a believer whose neighbor is not safe from his harm.

Source: Muṣannaf Ibn Abī Shaybah 24836, Grade: Sahih li ghayrihi

Anas ibn Malik reported: The Prophet, peace and blessings be upon him, said:

لا يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لأَخِيهِ مَا يُحِبُّ لِنَفْسِهِ

None of you will have faith until he loves for his brother what he loves for himself.

Source: Ṣaḥīḥ al-Bukhārī 13, Grade: Muttafaqun Alayhi

In another narration, the Prophet said:

لاَ يُؤْمِنُ أَحَدُكُمْ حَتَّى يُحِبَّ لأَخِيهِ أَوْ قَالَ لِجَارِهِ مَا يُحِبُّ لِنَفْسِهِ

None of you will have faith until he loves for his brother, or his neighbor, what he loves for himself.

Source: Ṣaḥīḥ Muslim 45, Grade: Sahih

Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said:

لَا يَسْتَقِيمُ إِيمَانُ عَبْدٍ حَتَّى يَسْتَقِيمَ قَلْبُهُ وَلَا يَسْتَقِيمُ قَلْبُهُ حَتَّى يَسْتَقِيمَ لِسَانُهُ وَلَا يَدْخُلُ رَجُلٌ الْجَنَّةَ لَا يَأْمَنُ جَارُهُ بَوَائِقَهُ

The faith of a servant is not upright until his heart is upright, and his heart is not upright until his tongue is upright. A man will not enter Paradise if his neighbor is not secure from his evil.

Source: Musnad Aḥmad 12636, Grade: Hasan

Anas ibn Malik reported: The Messenger of Allah, peace and blessings be upon him, said:

الْمُؤْمِنُ مَنْ أَمِنَهُ النَّاسُ وَالْمُسْلِمُ مَنْ سَلِمَ الْمُسْلِمُونَ مِنْ لِسَانِهِ وَيَدِهِ وَالْمُهَاجِرُ مَنْ هَاجَرَ السُّوءَ وَالَّذِي نَفْسِي بِيَدِهِ لا يَدْخُلُ الْجَنَّةَ عَبْدٌ لا يَأْمَنُ جَارُهُ بَوَائِقَهُ

The believer is one who is trusted by people. The Muslim is one from whose tongue and hand Muslims are safe. The emigrant is one who emigrates away from evil. By the one in whose hand is my soul, a servant will not enter Paradise if his neighbor is not secure from his harm.

Source: Ṣaḥīḥ Ibn Ḥibbān 515, Grade: Sahih

Abu Huraira reported: The Prophet, peace and blessings be upon him, said:

اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ جَارِ السُّوءِ فِي دَارِ الْمُقَامَةِ فَإِنَّ جَارَ الْبَادِي يَتَحَوَّلُ

O Allah, I seek refuge in you from an evil neighbor in the final abode. Verily, a neighbor in this world can be changed.

Source: Ṣaḥīḥ Ibn Ḥibbān 1046, Grade: Sahih li ghayri

‘Uqbah ibn ‘Amir reported: The Messenger of Allah, peace and blessings be upon him, said:

أَوَّلُ خَصْمَيْنِ يَوْمَ الْقِيَامَةِ جَارَانِ

Among the first disputants on the Day of Resurrection will be two neighbors.

Source: Musnad Aḥmad 16921, Grade: Hasan

Abu Huraira reported: A man said, “O Messenger of Allah, a woman prays in the night, fasts in the day, does many deeds and gives charity, yet she harms her neighbors with her tongue.” The Messenger of Allah, peace and blessings be upon him, said:

لا خَيْرَ فِيهَا هِيَ مِنْ أَهْلِ النَّارِ

There is no good in her. She is among the people of Hellfire.

The man said, “O Messenger of Allah, another woman prays the obligatory prayers and gives bits of food in charity, yet she does not harm anyone.” The Prophet said:

هِيَ مِنْ أَهْلِ الْجَنَّةِ

She is among the people of Paradise.

Source: al-Adab al-Mufrad 117, Grade: Sahih

Ibn Abbas reported: The Prophet, peace and blessings be upon him, said:

لَيْسَ الْمُؤْمِنُ الَّذِي يَشْبَعُ وَجَارُهُ جَائِعٌ إِلَى جَنْبِهِ

He is not a believer whose stomach is filled while the neighbor to his side goes hungry.

Source: al-Sunan al-Kubrá 19049, Grade: Sahih

Anas ibn Malik reported: The Prophet, peace and blessings be upon him, said:

مَا آمَنَ بِي مَنْ بَاتَ شَبْعَانًا وَجَارُهُ جَائِعٌ إِلَى جَنْبِهِ وَهُوَ يَعْلَمُ بِهِ

He does not have faith in me who spends the night satiated while he knows that the neighbor to his side is hungry.

Source: al-Mu’jam al-Kabīr 751, Grade: Sahih

Aisha reported: The Messenger of Allah, peace and blessings be upon him, said:

لَيْسَ بِالْمُؤْمِنِ الَّذِي يَبِيتُ شَبْعَانَ وَجَارُهُ جَائِعٌ إِلَى جَنْبِهِ

He is not a believer who spends the night satiated while the neighbor to his side is hungry.

Source: al-Mustadrak 2103, Grade: Sahih li ghayihi

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said:

وَأَحِبَّ لِلنَّاسِ مَا تُحِبُّ لِنَفْسِكَ تَكُنْ مُؤْمِنًا وَأَحْسِنْ جِوَارَ مَنْ جَاوَرَكَ تَكُنْ مُسْلِمًا

Love for people what you love for yourself and you will be a believer. Behave well with your neighbors and you will be a Muslim.

Source: Sunan Ibn Mājah 4217, Source: Sahih

Abdullah ibn Amr reported: The Messenger of Allah, peace and blessings be upon him, said:

خَيْرُ الأَصْحَابِ عِنْدَ اللَّهِ خَيْرُهُمْ لِصَاحِبِهِ وَخَيْرُ الْجِيرَانِ عِنْدَ اللَّهِ خَيْرُهُمْ لِجَارِهِ

The best companion to Allah is the best to his companions, and the best neighbor to Allah is the best to his neighbors.

Source: Sunan al-Tirmidhī 1944, Grade: Sahih

Aisha reported: The Prophet, peace and blessings be upon him, said:

مَا زَالَ يُوصِينِي جِبْرِيلُ بِالْجَارِ حَتَّى ظَنَنْتُ أَنَّهُ سَيُوَرِّثُهُ

Gabriel continued to advise me to treat neighbors well until I thought he would make them my heirs.

Source: Ṣaḥīḥ al-Bukhārī 5668, Grade: Muttafaqun Alayhi

Abu Umamah reported: The Messenger of Allah, peace and blessings be upon him, said:

أُوصِيكُمْ بِالْجَارِ

I enjoin you to be good to your neighbors.

Abu Umamah said:

أَكْثَرَ فَقُلْتُ إِنَّهُ لَيُوَرِّثُهُ

The Prophet repeated it so much that I said: Indeed, he will make them inherit from us!

Source: al-Mu’jam al-Kabīr 7397, Grade: Sahih

Mujahid reported: We were with Abdullah ibn Amr and his servant was preparing a roasted sheep. Abdullah said, “Young man, when you are finished, then begin with our Jewish neighbor.” A man said, “Jewish? May Allah rectify you!” Abdullah said:

إِنِّي سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يُوصِي بِالْجَارِ حَتَّى خَشِينَا أَوْ رُئِينَا أَنَّهُ سَيُوَرِّثُهُ‏

I heard the Prophet, peace and blessings be upon him, enjoining good treatment of our neighbors so often that we thought he would make them our heirs.

Source: al-Adab al-Mufrad 105, Grade: Sahih

Nafi’ ibn Abdul Harith reported: The Messenger of Allah, peace and blessings be upon him, said:

مِنْ سَعَادَةِ الْمَرْءِ الْجَارُ الصَّالِحُ وَالْمَرْكَبُ الْهَنِيءُ وَالْمَسْكَنُ الْوَاسِعُ

It is part of a person’s happiness to have a righteous neighbor, a comfortable mount, and a spacious dwelling.

Source: Musnad Ahmad 14947, Grade: Sahih

Sa’d ibn Abi Waqqas reported: The Messenger of Allah, peace and blessings be upon him, said:

أَرْبَعٌ مِنَ السَّعَادَةِ الْمَرْأَةُ الصَّالِحَةُ وَالْمَسْكَنُ الْوَاسِعُ وَالْجَارُ الصَّالِحُ وَالْمَرْكَبُ الْهَنِيءُ وَأَرْبَعٌ مِنَ الشَّقَاوَةِ الْجَارُ السُّوءُ وَالْمَرْأَةُ السُّوءُ وَالْمَسْكَنُ الضِّيقُ وَالْمَرْكَبُ السُّوءُ

Four things are part of happiness: a righteous spouse, a spacious dwelling, a righteous neighbor, and a comfortable mount. Four things are part of misery: a bad neighbor, a bad spouse, a restrictive dwelling, and a bad mount.

Source: Ṣaḥīḥ Ibn Ḥibbān 4032, Grade: Sahih