Verses with the word wards in the Old Testament (3 verses):

1 Chronicles 9:23
So they and their children had the oversight of the gates of the house of the LORD, namely, the house of the tabernacle, by wards.

1 Chronicles 26:12
Among these were the divisions of the porters, even among the chief men, having wards one against another, to minister in the house of the LORD.

Nehemiah 13:30
Thus cleansed I them from all strangers, and appointed the wards of the priests and the Levites, every one in his business;