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

التَّرْغِيب فِي الِامْتِنَاع عَن الدُّخُول على الظلمَة والترهيب من الدُّخُول عَلَيْهِم وتصديقهم وإعانتهم

Encouragement to refrain from seeking an audience with oppressors, and warning against seeking an audience with them, affirming them, and supporting them.

Source: al-Targhīb wal-Tarhīb 3/134

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

مَنْ أَتَى أَبْوَابَ السُّلْطَانِ افْتُتِنَ وَمَا ازْدَادَ عَبْدٌ مِنْ السُّلْطَانِ قُرْبًا إِلَّا ازْدَادَ مِنْ اللَّهِ بُعْدًا

Whoever goes to the gates of the ruler will be put to trial. A servant does not move closer to the ruler but that he moves further away from Allah.

Source: Musnad Aḥmad 8836, Grade: Sahih

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

مَنْ أَتَى أَبْوَابَ السُّلْطَانِ افْتَتَنَ

Whoever goes to the gates of the ruler will be afflicted with trials.

Source: Sunan al-Tirmidhī 2256, Grade: Sahih

Jabir ibn Abdullah reported: The Prophet, peace and blessings be upon him, said to Ka’b:

يَا كَعْبُ بْنَ عُجْرَةَ أُعِيذُكَ بِاللَّهِ مِنْ إِمَارَةِ السُّفَهَاءِ إِنَّهَا سَتَكُونُ أُمَرَاءُ مَنْ دَخَلَ عَلَيْهِمْ فَأَعَانَهُمْ عَلَى ظُلْمِهِمْ وَصَدَّقَهُمْ بِكَذِبِهِمْ فَلَيْسَ مِنِّي وَلَسْتُ مِنْهُ وَلَنْ يَرِدَ عَلَيَّ الْحَوْضَ وَمَنْ لَمْ يَدْخُلْ عَلَيْهِمْ وَلَمْ يُعِنْهُمْ عَلَى ظُلْمِهِمْ وَلَمْ يُصَدِّقْهُمْ بِكَذِبِهِمْ فَهُوَ مِنِّي وَأَنَا مِنْهُ وَسَيَرِدُ عَلَيَّ الْحَوْضَ يَا كَعْبُ بْنَ عُجْرَةَ الصَّلَاةُ قُرْبَانٌ وَالصَّوْمُ جُنَّةٌ وَالصَّدَقَةُ تُطْفِئُ الْخَطِيَّةَ كَمَا يُطْفِئُ الْمَاءُ النَّارَ

O Ka’b ibn ‘Ujrah, I seek refuge in Allah on your behalf from the leadership of fools, for they will become rulers. Whoever has an audience before them, supports them in their wrongdoing, and affirms their lies, then he is not part of me and I am not part of him. He will never meet me at the Fountain. Whoever does not have an audience before them, does not support them in their wrongdoing, and does not affirm their lies, then he is part of me and I am part of him. He will meet me at the Fountain. O Ka’b ibn ‘Urjah, prayer brings one closer to Allah, fasting is a shield, and charity extinguishes sins just as water extinguishes fire.

Source: Ṣaḥīḥ Ibn Ḥibbān 1723, Grade: Sahih

سَيَكُونُ بَعْدِي أُمَرَاءُ فَمَنْ دَخَلَ عَلَيْهِمْ فَصَدَّقَهُمْ بِكَذِبِهِمْ وَأَعَانَهُمْ عَلَى ظُلْمِهِمْ فَلَيْسَ مِنِّي وَلَسْتُ مِنْهُ وَلَيْسَ بِوَارِدٍ عَلَيَّ الْحَوْضَ وَمَنْ لَمْ يَدْخُلْ عَلَيْهِمْ وَلَمْ يُعِنْهُمْ عَلَى ظُلْمِهِمْ وَلَمْ يُصَدِّقْهُمْ بِكَذِبِهِمْ فَهُوَ مِنِّي وَأَنَا مِنْهُ وَهُوَ وَارِدٌ عَلَيَّ الْحَوْضَ

Verily, rulers will come after me and whoever enters their audience, affirms their lies, and supports their oppression, they are not part of me and I am not part of them. They will have no presence at the Fountain. Whoever does not enter their audience, does not support their oppression, and does not affirm their lies, he is part of me and I am part of him. He will be present at the Fountain.

Source: Sunan al-Tirmidhī 2190, Grade: Sahih

Al-Nu’man ibn Bashir reported: The Prophet, peace and blessings be upon him, said:

أَلَا إِنَّهُ سَيَكُونُ بَعْدِي أُمَرَاءُ يَكْذِبُونَ وَيَظْلِمُونَ فَمَنْ صَدَّقَهُمْ بِكَذِبِهِمْ وَمَالَأَهُمْ عَلَى ظُلْمِهِمْ فَلَيْسَ مِنِّي وَلَا أَنَا مِنْهُ وَمَنْ لَمْ يُصَدِّقْهُمْ بِكَذِبِهِمْ وَلَمْ يُمَالِئْهُمْ عَلَى ظُلْمِهِمْ فَهُوَ مِنِّي وَأَنَا مِنْهُ أَلَا وَإِنَّ دَمَ الْمُسْلِمِ كَفَّارَتُهُ أَلَا وَإِنَّ سُبْحَانَ اللهِ وَالْحَمْدُ لِلَّهِ وَلَا إِلَهَ إِلَّا اللهُ وَاللهُ أَكْبَرُ هُنَّ الْبَاقِيَاتُ الصَّالِحَاتُ

Surely, there will be rulers after me who tell lies and commit oppression. Whoever affirms their lies and advises them in their wrongdoing, then he is not part of me and I am not part of him. Whoever does not affirm their lies, nor advise them in their wrongdoing, then he is part of me and I am part of him. Verily, the Muslim whose blood is shed is an expiation for him. Verily, the glorification of Allah, the praise of Allah, the declaration there is no God but Allah, and Allah is the greatest, these righteous deeds will endure.

Source: Musnad Aḥmad 18353, Grade: Sahih li ghayrihi

Khabbab ibn al-Aratt reported: The Prophet, peace and blessings be upon him, said:

إِنَّهُ سَيَكُونُ من بَعْدِي أُمَرَاءُ فَلَا تُصَدِّقُوهُمْ بِكَذِبِهِمْ وَلَا تُعِينُوهُمْ عَلَى ظُلْمِهِمْ فَإِنَّهُ مَنْ صَدَّقَهُمْ بِكَذِبِهِمْ وَأَعَانَهُمْ عَلَى ظُلْمِهِمْ لَمْ يَرِدْ عَلَيَّ الْحَوْضَ

Verily, there will be rulers after me, so do not affirm their lies, nor help them in their wrongdoing. Whoever affirms their lies and helps them in their wrongdoing, he will be turned away from me at the Fountain.

Source: Ṣaḥīḥ Ibn Ḥibbān 284, Grade: Hasan

Bilal ibn al-Harith reported: The Messenger of Allah, peace and blessings be upon him, said:

إِنَّ أَحَدَكُمْ لَيَتَكَلَّمُ بِالْكَلِمَةِ مِنْ رِضْوَانِ اللَّهِ مَا يَظُنُّ أَنْ تَبْلُغَ مَا بَلَغَتْ فَيَكْتُبُ اللَّهُ لَهُ بِهَا رِضْوَانَهُ إِلَى يَوْمِ يَلْقَاهُ وَإِنَّ أَحَدَكُمْ لَيَتَكَلَّمُ بِالْكَلِمَةِ مِنْ سَخَطِ اللَّهِ مَا يَظُنُّ أَنْ تَبْلُغَ مَا بَلَغَتْ فَيَكْتُبُ اللَّهُ عَلَيْهِ بِهَا سَخَطَهُ إِلَى يَوْمِ يَلْقَاهُ

Verily, one of you may speak a word pleasing to Allah, thinking it does not amount to much, yet by it Allah decrees His pleasure with him until the day he meets Him. Verily, one of you may speak a word displeasing to Allah, thinking it does not amount to much, yet Allah decrees His displeasure with him until the day he meets Him meets.

Source: Sunan al-Tirmidhī 2319, Grade: Sahih