Musnad Ahmad ibn Hanbal, hadith 711

حَدَّثَنَا يَزِيدُ، أَنْبَأَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ هِشَامِ بْنِ عَمْرٍو، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْحَارِثِ بْنِ هِشَامٍ، عَنْ عَلِيٍّ، رَضِيَ اللَّهُ عَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَقُولُ فِي آخِرِ وِتْرِهِ اللَّهُمَّ إِنِّي أَعُوذُ بِرِضَاكَ مِنْ سَخَطِكَ وَأَعُوذُ بِمُعَافَاتِكَ مِنْ عُقُوبَتِكَ وَأَعُوذُ بِكَ مِنْكَ لَا أُحْصِي ثَنَاءً عَلَيْكَ أَنْتَ كَمَا أَثْنَيْتَ عَلَى نَفْسِكَ‏.‏

It was narrated from `Ali (رضي الله عنه) that The Prophet (ﷺ) used to say at the end of his Witr `O Allah, I seek refuge in Your pleasure from Your wrath, I seek refuge in Your forgiveness from Your punishment, I seek refuge in You from You. I cannot praise You enough, You are as You have praised Yourself.”