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 6343
Abu Barza reported: I said: Allah's Messenger, teach me something so that I may derive benefit from it. He said: Remove the troublesome thing from the paths of the Muslims.