Then he commanded them, saying, "This is what you shall do: One-third of you who come on duty on the Sabbath shall be keeping watch over the king's house,
2 Kings 11:5
Surrounding context
11:4 In the seventh year Jehoiada sent and brought the captains of hundreds--of the bodyguards and the escorts--and brought them into the house of the LORD to him. And he made a covenant with them and took an oath from them in the house of the LORD, and showed them the king's son.
11:5 Then he commanded them, saying, "This is what you shall do: One-third of you who come on duty on the Sabbath shall be keeping watch over the king's house,
11:6 one-third shall be at the gate of Sur, and one-third at the gate behind the escorts. You shall keep the watch of the house, lest it be broken down.