Musnad Ahmad 8:172

Abdullah ibn Numayr and Ya‘la narrated to us, they said: Musa—meaning al-Juhani—narrated to us, 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 Prophet of Allah, teach me words that I may say." He said: "Say: 'There is no god but Allah alone, He has no partner. Allah is the Greatest, [much] greatness; and praise be to Allah, much praise; glory be to Allah, Lord of the worlds. There is no power and no strength except by Allah, the Almighty, the All-Wise.'" He said: "These are for my Lord, Mighty and Majestic is He, so what is for me?" He said: "Say: 'O Allah, forgive me, have mercy on me, guide me, and provide for me.'" Ibn Numayr said: Musa said: "As for 'grant me well-being' (‘afini), I suspect [it was included], but I do not know."