Musnad Abu Ya'la al-Mawsili 150:180

Abu Kurayb narrated to us, Hafs ibn Bishr al-Asadi narrated to us, he said: Hakim ibn Nafi' narrated to us, from Hisham ibn 'Urwah, from his father, from 'Aishah, she said: The Messenger of Allah (may Allah bless him and grant him peace) said: "The two prostrations of forgetfulness suffice for every addition and omission."