He sent them off to Lebanon in shifts of ten thousand a month, so that they spent one month in Lebanon and two months at home. Adoniram was in charge of the forced labor.
NIV
He sent them to Lebanon, 10,000 a month by divisions; one month they were in Lebanon and two months at home. Adoniram was over the levy.
AMP
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.
KJV