Hannad reported from Abdullah who from Ubaydullah ibn Umar who from Muhammad
ibn Yahya ibn Hibban who from his uncle Wasi' ibn Hibban who from Sayyidina Ibn Umar
who said, "I went up the roof of Hafsah's house and saw Allah's Messenger relieving
himself, His face was towards Syria and back towards the Ka'bah."
[Ahmed4812, 4991, Bukhari 145, 4991, Muslim 266, Abu Dawud 12, Ibn e Majah 322,