Musnad Abu Ya'la al-Mawsili 3:15

Abu Khaythama narrated to us, Yazid bin Harun narrated to us, Hammad bin Salama narrated to us, from Hisham bin Amr al-Fazari, from Abd al-Rahman bin al-Harith bin Hisham, from Ali, that the Prophet, peace and blessings of Allah be upon him, used to say in his Witr: "O Allah, I seek refuge in Your pleasure from Your anger, and I seek refuge in Your pardon from Your punishment, and I seek refuge in You from You. I cannot enumerate Your praise; You are as You have praised Yourself."