Ya'la bin Mamlak says that I asked Umm Salama (may Allah be pleased with her) about the night prayer and recitation of the Prophet (peace and blessings be upon him), so she said: "Where are you and where is the prayer and recitation of the Prophet (peace and blessings be upon him)? The Prophet (peace and blessings be upon him) used to pray for as long as he slept, and he used to sleep for as long as he prayed. Then, regarding the manner of the Prophet's (peace and blessings be upon him) recitation that she described, it was with clarification of each and every letter."