He sent them to Lebanon in monthly shifts of 10,000 men, so that they would spend one month in Lebanon and two months at home. And Adoniram was in charge of the forced labor.
KJV
And 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 levy.
ASV
And 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 taskwork.