Sahih Bukhari: Hadith 2188

Allah's Messenger (ﷺ) said, "Both of them (Moses and Al-Khadir) proceeded on till they reached a wall which was about to fall." Sa`d said [?? or Sa`id], "(Al-Khadir pointed) with his hands (towards the wall) and then raised his hands and the wall became straightened up." Ya`la said, "I think Sa`id [?? or Sa`d] said, 'He (Khadir) passed his hand over it and it was straightened up." (Moses said to him), "if you had wanted, you could have taken wages for it." Sa`id [?? or Sa`d] said, "Wages with which to buy food . "