'Guards' in the Bible

He guards the steps of His faithful ones,but the wicked perish in darkness,for a man does not prevail by his own strength.

He had bronze shin guards on his legs, and a bronze javelin was slung over his shoulders.

Then the king ordered the guards standing by him, “Turn and kill the priests of the Lord because they sided with David. For they knew he was fleeing, but they didn’t tell me.” But the king’s servants would not lift a hand to execute the priests of the Lord.