Musnad Abu Ya'la al-Mawsili 150:281

Ahmad ibn ‘Isa narrated to us, Ibn Wahb narrated to us, Aflah ibn Humayd informed me that he heard al-Qasim ibn Muhammad narrating from ‘Aishah, that the Messenger of Allah (may Allah bless him and grant him peace) had intercourse with his wife and did not perform ghusl (ritual bath) until he reached the morning, then he performed ghusl, prayed, and fasted that day of his.