One should recite the following Duaa after performing the witr salaah:
اللَّهُمَّ إِنِّى أَعُوذُ بِرِضَاكَ مِنْ سَخَطِكَ وَبِمُعَافَاتِكَ مِنْ عُقُوبَتِكَ وَأَعُوذُ بِكَ مِنْكَ لاَ أُحْصِى ثَنَاءً عَلَيْكَ أَنْتَ كَمَا أَثْنَيْتَ عَلَى نَفْسِكَ
O Allah, I seek refuge in Your pleasure from Your displeasure, and in Your forgiveness from Your punishment, and I seek refuge in You (in Your mercy) from You (from Your punishment).…
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