Quran 18:82 — The Cave (Al-Kahf)

"As for the wall, it belonged to two orphan boys in the city. Under it, there was a treasure that belonged to them. Because their father was a righteous man, your Lord wanted them to grow up and attain full strength, then extract their treasure. Such is mercy from your Lord. I did none of that of my own volition. This is the explanation of the things you could not stand."

[18:81] "We willed that your Lord substitute in his place another son; one who is better in righteousness and kindness.

[18:83] They ask you about Zul-Qarnain. Say, "I will narrate to you some of his history."