Chapter 50: The Book of Seeking Refuge with Allah
Ibn Yasaf said: "I asked 'Aishah, what was the supplication that the Prophet [SAW] said the most? She said: 'The supplication that he said the most was: Allahumma, inni a' udhu bika min sharri ma 'amiltu wa min sharri ma lam a' mal ba' d (O Allah, I seek refuge with You from the evil of what I have done, and from the evil of what I have not done yet.)'"
Sunan an-Nasa'i 5524