Musnad Abu Ya'la al-Mawsili 117:211

Abu Yusuf al-Jizi narrated to us, Mu'ammal ibn Isma'il narrated to us, Hammad ibn Salamah narrated to us, from Thabit, from Anas, who said: The Prophet, peace and blessings of Allah be upon him, used to say in his supplication: "O Allah, turn my heart toward Your religion, and protect those who are behind us with Your mercy."