Maliks Muwatta Book 015, Hadith Number 045.

Section : Forbidding Prayer After Subh and After Asr.

Yahya related to me from Malik from Hisham ibn Urwa that his father said that the Messenger of Allah, may Allah bless him and grant him peace, used to say, "Delay the prayer when the edge of the sun appears until it is completely in view, and delay the prayer when the edge of the sun is disappearing until it has completely disappeared."

Related Hadith(s)