Sahih Al Bukhari (558)

عن ابن عباس رضي الله عنهما قال {بت في بيت خالتي ميمونة فصلى رسول الله صلى الله عليه وسلم العشاء ثم جاء فصلى أربع ركعات ثم نام ثم قام فجئت فقمت عن يساره فجعلني عن يمينه فصلى خمس ركعات ثم صلى ركعتين ثم نام حتى سمعت غطيطه أو قال خطيطه ثم خرج إلى الصلاة}

Ibn `Abbas (may Allah be pleased with him) narrated: Once I passed the night in the house of my aunt Maymunah. Allah’s Messenger (peace be upon him) offered the ‘Isha’ prayer and then came to the house and offered four Rak‘at and slept. Later on, he woke up and stood for the prayer and I stood on his left side. He drew me to his right and prayed five Rak‘at and then two. He then slept till I heard him snoring (or heard his breath sounds). Afterwards he went out for the morning prayer.