Abu Huraira reported Allah's Messenger ﷺ as saying, “If anyone summons others to follow right guidance, his reward will be equivalent to those of the people who follow him without their rewards being diminished in any respect on that account; and if anyone summons others to follow error the sin of which he is guilty will be equivalent to those of the people who follow him without their sins’ being diminished in any respect on that account.” Muslim transmitted it.

‘A’isha reported Allah's Messenger ﷺ as saying, “When a man’s sins are numerous and he has no good deeds wherewith to atone for them, Allah afflicts him with sorrow to remove them from him.” Ahmad transmitted it.

Jabir reported Allah's Messenger ﷺ as saying, "When one visits an invalid he continues to plunge into mercy till he sits down, and when he sits down he is immersed in it.” Malik and Ahmad transmitted it.

Thauban reported Allah's Messenger ﷺ as saying, "When one of you has an attack of fever the fever is a portion of hell, so he should quench it with water, bathing in a flowing stream facing the direction of the current and saying, ‘In the name of Allah. O Allah, heal Thy servant and varify Thy messenger’ after the morning prayer before sunrise. He should dip himself in it three times a day for three days, and if he is not cured in three days, then for five days, and if he is not cured in five days, then for seven, and if he is not cured in seven days, then for nine, for it will hardly last more than nine days by the permission of Allah who is great and glorious.” Tirmidhi transmitted it, saying this is a gharib tradition.

Abu Huraira said that fever was mentioned in the presence of Allah's Messenger ﷺ, and when a man reviled it the Prophet (ﷺ) said, "Do not revile it, for it removes sins as fire removes the dross of iron.” Ibn Majah transmitted it.

He said that Allah's Messenger ﷺ said to an invalid whom he visited, "Cheer up, for Allah most high says, ‘It is my fire to which I give power over my believing servant in the world to be his portion of hell on the day of resurrection.” Ahmad, Ibn Majah and Baihaqi, in Shu'ab al- iman, transmitted it.

Anas reported Allah's Messenger ﷺ as stating that the Lord who is glorious and exalted says, "By my might and glory, I will not take out of the world anyone I intend to forgive till I get payment for every sin which hangs on his neck by illness in his body and scarcity in his provision.” Razin transmitted it.

Shaqiq said he visited ‘Abdallah b. Mas'ud when he was ill, and he began to weep. On being reproved by someone he said, "I am not weeping because of the illness, because I heard Allah's Messenger ﷺ say that illness is an atonement; I am weeping simply because it has come to me when my powers are weakened and did not come when I was active, because a servant of Allah has recorded for him such reward when he is ill as was being recorded for him before he became ill and the illness prevented him from doing [good deeds].” Razln transmitted it.

Anas said the Prophet (ﷺ) was not accustomed to visit an invalid till he had been ill for three days. Ibn Majah and Baihaqi, in Shu'ab al- iman, transmitted it.

‘Umar b. al-Khattab reported Allah's Messenger ﷺ as saying, “When you visit an invalid tell him to make supplication for you, for his supplication is like that of the angels.” Ibn Majah transmitted it.

Ibn ‘Abbas said that staying for a short time and making little noise when visiting an invalid is part of the sunna. He reported Allah's Messenger ﷺ as saying, when their clamour and disagreement became excessive, ‘‘Get up and leave me.”(This was during the Prophet's last illness, the disagreement taking place regarding the advisability of the Prophet (ﷺ) giving them further written instructions.) Razin transmitted it.