Musannaf Ibn Abi Shayba 3:5320

Ibn Fudayl narrated to us, from al-‘Ala’ ibn al-Musayyab, from ‘Amr ibn Murrah, from Talhah ibn Yazid, from Hudhayfah, who said: The Messenger of Allah (may Allah bless him and grant him peace) stood with us one night of Ramadan in a chamber made of palm branches. Then he poured a bucket of water over himself. Then he said: "Allah is the Greatest, Allah is the Greatest, the Possessor of the Kingdom, the Power, the Pride, and the Greatness."