Jami' at-Tirmidhi — Hadith #26848

Ali bin Hajar told us, Ismail bin Jafar told us, on the authority of Humaid, on the authority of Anas, that he said the Messenger of God, may God bless him and grant him peace, had intercourse with his wives for a month. So he stayed in Mashrabiya for twenty-nine days. They said, “O Messenger of God, you have spent a month.” He said, “The month is twenty-nine.” Abu Issa, this is a good and authentic hadith.