The word(s) "manslaughter" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) For this reason did We prescribe to the children of Israel that whoever slays a soul, unless it be for manslaughter or for mischief in the land, it is as though he slew all men; and whoever keeps it alive, it is as though he kept alive all men; and certainly Our apostles came to them with clear arguments, but even after that many of them certainly act extravagantly in the land.

(2) So they went on until, when they met a boy, he slew him. (Musa) said: Have you slain an innocent person otherwise than for manslaughter? Certainly you have done an evil thing.