'Guarded' in the Bible

David said to Abner, “Are you not a [brave] man? Who is like you in Israel? Why then have you not guarded your lord the king? For one of the people came [into your camp] to kill the king your lord.

This thing that you have done is not good. As the Lord lives, you surely deserve to die, because you have not guarded your lord, the Lord’s anointed. And now, see where the king’s spear is, and the jug of water that was by his head.”

Then Jehoiada the priest took a chest and bored a hole in its lid and set it beside the altar, on the right side as one enters the house of the Lord; and the priests who guarded the door put in the chest all the money that was brought [by the people] into the house of the Lord.

In those days, while Mordecai was sitting at the king’s gate, Bigthan and Teresh, two of the king’s eunuchs who guarded the door, became angry and conspired to attack King Ahasuerus.

It was found written there how Mordecai had reported that Bigthana and Teresh, two of the king’s eunuchs who were doorkeepers, had planned to attack King Ahasuerus (Xerxes).