Musnad Abu Ya'la al-Mawsili 150:61

Mujahid ibn Musa narrated to us, Abu Usamah narrated to us, he said: Ubaydullah narrated to us, Muhammad ibn Yahya ibn Habban informed me, from Abd al-Rahman al-A'raj, from Abu Hurayrah, from Aisha, who said: I missed the Prophet, may Allah bless him and grant him peace, one night from the bed, so I sought him with my hand, and my hand fell upon his feet while they were upright, and he was prostrating, and he was saying: "O Allah, I seek refuge in Your pardon from Your punishment, and I seek refuge in Your pleasure from Your wrath, and I seek refuge in You from You. I cannot enumerate Your praise; You are as You have praised Yourself."