'Slaying' in the Bible

and gathereth unto himself men, and is head of a troop in David's slaying them, and they go to Damascus, and dwell in it, and reign in Damascus;

And he cried unto the LORD, and said, O LORD my God, hast thou also brought evil upon the widow with whom I sojourn, by slaying her son?

'Hath it not been declared to my lord that which I have done in Jezebel's slaying the prophets of Jehovah, that I hide of the prophets of Jehovah a hundred men, fifty by fifty in a cave, and sustained them with bread and water?