Musannaf Ibn Abi Shayba 1:1413

'Abbad ibn al-'Awwam narrated to us, from Sa'id ibn Yazid, from Abu Nadra, from Ibn 'Abbas, who said: I visited my maternal aunt Maymunah, and I coincided with the night of the Prophet, may Allah bless him and grant him peace. He stood up at night to pray, then he slept, and I heard his snoring. He said: Then Bilal came to inform him of the prayer, so he went out to the prayer and did not perform ablution, and he did not touch water.