'Protect' in the Bible

David called to Abner, “You’re a man, aren’t you? Who in Israel is your equal? So why didn’t you protect your lord the king when one of the people came to destroy him?

What you have done is not good. As the Lord lives, all of you deserve to die since you didn’t protect your lord, the Lord’s anointed. Now look around; where are the king’s spear and water jug that were by his head?”