Sunan Ibn Majah, Chapter: The Chapters on Supplication

"I noticed that the Messenger of Allah (saw) was missing from his bed one night, so I went looking for him, and my hand touched the soles of his feet; he was in the Masjid with his feet upright (prostrating), and he was saying: 'Allahumma inni a'udhu biridaka min sakhatika wa bimu'afatika 'an 'uqubatika, wa a'udhu bika minka, la uhsi thana'an 'alayka, Anta kama athnayta 'ala nafsika (O Allah, I seek refuge in Your pleasure from Your wrath, and 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).'"