Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates from Sayyiduna Abu Ayyub (may Allah be pleased with him) that he said: Whenever I prayed behind your Prophet (peace and blessings be upon him), I heard him (peace and blessings be upon him) say, as he finished his prayer: "O Allah, forgive my error and all my sins. O Allah, raise me up, mend my shortcomings, provide for me, and guide me to righteous deeds and good character; indeed, none guides to their best nor turns away their evil except You."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3860