Moses and al-Khidr
Then they continued until they met a boy, and he killed him. Moses said, “Have you killed an innocent soul without justification? You have done something dreadful!”
18:74So they twain journeyed on till, when they met a lad, he slew him. (Moses) said: What! Hast thou slain an innocent soul who hath slain no man? Verily thou hast done a horrid thing.