It wasnarrated from 'Ali bin Abi Talib that the Prophet (ﷺ) usedto sayat the end of Witr:
"Allahumma inni a'udhu biridaka minsakhatika, wa a'udhu bimu'afatika min 'uqubatika, wa a'udhubikaminka, la uhsi thana'an 'alaika, Anta kama athnaita 'alanafsika (OAllah, I seek refuge in Your pleasure from Your wrath, andI seekrefuge in Your forgiveness from your punishment, and I seekrefuge inYou from You. I cannot enumerate Your praise, You are asYou havepraised Yourself)."
English reference: Vol. 1, Book 5, Hadith 1179
Arabic reference: Book 5, Hadith 1235