It was narrated from 'Abdah bin Abi Lubabah that Ibn Yasaf told him that he asked 'Aishah, the wife of the Prophet [SAW], :
What supplication did the Messenger of Allah [SAW] say the most before he died? 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.)'"