'Slaying' in the Bible

And the watchmen of Saul in Gibeah of Benjamin looked, and behold, the multitude melted away, and they went on slaying one another.

for he put his life in hand, and smote the Philistine, and Jehovah wrought a great salvation for all Israel: thou didst see it, and didst rejoice; why then wilt thou sin against innocent blood, in slaying David without cause?