'Subject' in the Bible

and Ahishar was over the household; and Adoniram the son of Abda was over the men subject to forced labor.

He sent them to Lebanon, ten thousand a month by courses; a month they were in Lebanon, and two months at home; and Adoniram was over the men subject to forced labor.

Then king Rehoboam sent Adoram, who was over the men subject to forced labor; and all Israel stoned him to death with stones. King Rehoboam made speed to get him up to his chariot, to flee to Jerusalem.