Ya'la b. Mamlak said he asked Umm Salama, the Prophet’s wife, about his recitation and prayer. She Said, “What have you to do with his prayer? He would pray, then sleep as long as he had prayed, then pray as long as he had slept, then sleep as long as he had prayed, till morning.” She then described his recitation and did so with an exposition word by word. Abu Dawud, Tirmidhi and Nasa’i transmitted it.