Musannaf Ibn Abi Shayba 21:230

Ali ibn Mushir and Marwan ibn Mu'awiyah narrated to us, from Musa al-Juhani, from Mus'ab ibn Sa'd, from his father, who said: A Bedouin came to the Prophet, may Allah bless him and grant him peace, and said: "O Messenger of Allah, teach me something that I may say." He said: "Say: 'There is no god but Allah alone, He has no partner. To Him belongs the dominion. Allah is the Greatest, [He is] the Greatest. Praise be to Allah, abundantly. Glory be to Allah, Lord of the worlds. There is no power and no strength except by Allah, the Almighty, the Forbearing.'" He said: The Bedouin said: "This is for my Lord, so what is for me?" He said: "Say: 'O Allah, forgive me, have mercy on me, guide me, provide for me, and grant me well-being.'"