The Book of Virtue, Good Manners and Joining of the Ties of Relationship (Kitab Al-Birr was-Salat-I-wa'l-Adab)

Muslim :: Book 32 : Hadith 6242

Abu Sa'id and abu Huraira reported that they heard Allah's Messenger (may peace be upon him) as saying: Never a believer is stricken with discomfort, hardship or illness, grief or even with mental worry that his sins are not expiated for him.

Source materials are from the University of Southern California MSA site
Hadith eBooks converted from Imaan Star