Musnad Ahmad 25:1036

Yahya ibn Adam narrated to us, Kamil ibn al-Ala’ narrated to us, from Habib ibn Abi Thabit, from Ibn Abbas, or from Sa’id ibn Jubayr, from Ibn Abbas: That the Messenger of Allah, peace and blessings of Allah be upon him, said between the two prostrations in the night prayer: "O Lord, forgive me, and have mercy on me, and raise me, and provide for me, and guide me." Then he prostrated.