Musnad Abu Ya'la al-Mawsili 151:61

Muhammad ibn Abi Bakr al-Muqaddami narrated to us, Hammad ibn Zayd narrated to us, Aban ibn Taghlib narrated to us, from Abu Ishaq, from Abd al-Rahman ibn Yazid, from Abdullah, from the Prophet, may Allah bless him and grant him peace, that he said: "At your service, O Allah, at your service. At your service, there is no partner for You, at your service. Indeed, all praise and grace belong to You."