Al-Aswad ibn Yazid said

“I asked 'A'sha (may Allah be well pleased with her) about the nighttime ritual prayer of Allah’s Messenger (Allah bless him and give him peace), so she said: ‘He used to sleep at the beginning of the night. Then he would get up, and when it was the time before daybreak, he performed a witr [a ritual prayer with an odd number of cycles]. Then he came to his mattress, and if he had a need, he had sexual intercourse with his wife. When he heard the call to prayer, he sprang up, and if he was in a state of major ritual impurity, he poured water over himself, and if not, he performed the minor ritual ablution and went out to the ritual prayer.”