Ibn Abbas (may Allah be pleased with them both) said: I spent the night in the house of my maternal aunt Maymunah bint al-Harith (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him). The Messenger of Allah (peace and blessings be upon him) led the Isha prayer, then came home and prayed four rak'ahs. Then he slept, then he woke up and asked: "Has the little boy slept?" or said a word similar to it. Then he (peace and blessings be upon him) stood up for prayer, and I stood on his (peace and blessings be upon him) left side. He (peace and blessings be upon him) moved me to his right side. He (peace and blessings be upon him) prayed five rak'ahs, then prayed two rak'ahs, then he (peace and blessings be upon him) slept, until I heard the sound of his (peace and blessings be upon him) snoring; then he (peace and blessings be upon him) went out for the prayer.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4507