Quran 18:77 — The Cave (Al-Kahf)

So they went. When they reached a certain community, they asked the people for food, but they refused to host them. Soon, they found a wall about to collapse, and he fixed it. He said, "You could have demanded a wage for that!"

[18:76] He said, "If I ask you about anything else, then do not keep me with you. You have seen enough apologies from me."

[18:78] He said, "Now we have to part company. But I will explain to you everything you could not stand.