'Killing' in the Bible

When David returned from killing the Philistine, Abner took him and brought him before Saul with the Philistine’s head still in his hand.

As the troops were coming back, when David was returning from killing the Philistine, the women came out from all the cities of Israel to meet King Saul, singing and dancing with tambourines, with shouts of joy, and with three-stringed instruments.

He took his life in his hands when he struck down the Philistine, and the Lord brought about a great victory for all Israel. You saw it and rejoiced, so why would you sin against innocent blood by killing David for no reason?”