'Innocent' in the Bible

He risked his life when he struck down the Philistine and the Lord gave all Israel a great victory. When you saw it, you were happy. So why would you sin against innocent blood by putting David to death for no reason?"

He said to David, "You are more innocent than I, for you have treated me well, even though I have tried to harm you!

Your conscience will not be overwhelmed with guilt for having poured out innocent blood and for having taken matters into your own hands. When the Lord has granted my lord success, please remember your servant."