Sur — The chief gate of the temple. The guard — Either, the king's guard. Or, the guard of the temple; this gate was in the south — side. So, &c. — So you shall guard all the gates or entrances into the temple that neither Athaliah nor any of her soldiers may break in.
Related Commentaries of 2 Kings 11:6
2 Kings 11:6
6 And a third part shall be at the gate of Sur; and a third part at the gate behind the guard: so shall ye keep the watch of the house, that it be not broken down.