1 Chronicles 9:24-26

24At the four quarters were the doorkeepers, toward the east, west, north, and south.

25And their brethren, in their villages, were to come after [every] seven days from time to time with them.

26For in their trust these four were the chief doorkeepers: they were Levites; and they were over the chambers and over the treasuries of the house of 1God;