2 Samuel 5:13

Verse 2 Samuel 5:13. David took him more concubines] He had, in all conscience, enough before; he had, in the whole, eight wives and ten concubines. That dispensation permitted polygamy, but from the beginning it was not so; and as upon an average there are about fourteen males born to thirteen females, polygamy is unnatural, and could never have entered into the original design of God.