1 Chronicles 9:23-27

So they and their sons were in charge of the gates of the house of the Lord, the house of the tent, in their divisions of service.

The gatekeepers were on the four sides, to the east, west, north, and south.

Their relatives in their settlements were to come in every seven days from time to time to be with them;

for the four chief gatekeepers, who were Levites, served in an official capacity, and were in charge of the chambers and in charge of the treasuries in the house of God.

They spent the night around the house of God, because the watch was committed to them; and they were in charge of opening it morning by morning.