Musnad Ahmad 30:795

Yazid narrated to us, Mas'udi informed us, from 'Alqamah ibn Marthad, from Abu al-Rabi', from Abu Hurayrah, who said: The Messenger of Allah, may Allah bless him and grant him peace, used to say: "O Allah, forgive me for what I have sent forth and what I have delayed, and what I have kept secret and what I have made public, and my extravagance, and that which You know better than I do. You are the Advancer and You are the Delayer. There is no god but You."