4 Heb “wives, princesses.”
5 Concubines were slave women in ancient Near Eastern societies who were the legal property of their master, but who could have legitimate sexual relations with their master. A concubine’s status was more elevated than a mere servant, but she was not free and did not have the legal rights of a free wife. The children of a concubine could, in some instances, become equal heirs with the children of the free wife. The usage in the present passage suggests that after the period of the Judges concubines may have become more of a royal prerogative (cf. also 2 Sam 21:10–14).
6 Heb “his wives bent his heart.”

In other versions

He had 700 wives, who were princesses, and 300 concubines. And his wives turned away his heart.

He had seven hundred wives of royal birth and three hundred concubines, and his wives led him astray.

He had seven hundred wives who were princesses and three hundred who were concubines, and they turned his heart away.

He had 700 wives of royal birth and 300 concubines. And in fact, they did turn his heart away from the Lord.

He had seven hundred princesses and three hundred concubines, and his wives turned his heart.

And he had seven hundred wives, princesses, and three hundred concubines: and his wives turned away his heart.

Public Domain