Musannaf Ibn Abi Shaybah 4862 — A man who sleeps through his portion

Al-Qasim said: We used to visit Sayyidah Aishah (may Allah be pleased with her) before the Fajr prayer. One day we came and she was praying. She said: I could not pray my regular portion last night, and I did not think it right to leave it, so I am praying it now.