Musnad Ahmad 38:0

Narrated by Abd al-Rahman ibn Abza al-Khuza'i: A man came to the Prophet (ﷺ) and said: "O Messenger of Allah, I cannot memorize anything of the Quran, so teach me something that will suffice me." He said: "Say: 'Glory be to Allah, and praise be to Allah, and there is no god but Allah, and Allah is the Greatest, and there is no power and no strength except by Allah.'" The man said: "O Messenger of Allah, this is for my Lord, so what is for me?" He said: "Say: 'O Allah, forgive me, and have mercy on me, and guide me, and grant me health, and provide for me.'" When the man turned away, the Prophet (ﷺ) said: "He has filled his hands with good."