Sahih Muslim Book 4, Hadith Number 986.

Chapter : Following the Imam and acting after him.

‘Aisha reported: One night I missed Allah’s Messenger (may peace be upon him) from the bed, and when I sought him my hand touched the soles of his feet while he was in the state of prostration; they (feet) were raised and he was saying: “O Allah, I seek refuge in Thy pleasure from Thy anger, and in Thy forgiveness from Thy punishment, and I seek refuge in Thee from Thee (Thy anger). I cannot reckon Thy praise. Thou art as Thou hast lauded Thyself.”