John Gill Commentary Leviticus 24:17

"And he that smiteth any man mortally shall surely be put to death." — Leviticus 24:17 (ASV)

And he that killeth any man shall surely be put to death. With the sword, as the Targum of Jonathan adds; which restrains it to any man of the children of Israel, but wrongly; for the original law respects any man whatever, (Genesis 9:6); and so it does here; (See Gill on Exodus 21:12).