1_Kings 11:3-4: Solomon multiplied wives (up to 1,000!) which was prohibited and prophesied that a king would do in Deuteronomy 17:17. But that passage in 1_Kings 11:3-4 says his father David's heart was "perfect". Indeed, as the previous verse of Deuteronomy 17:16 also prohibits a king from multiplying horses, no one would read that to think that it suggests that a king was somehow not able to have/add more than one horse! As such, there is a clear difference between multiplying and merely adding. And this can be seen as the difference between Solomon and his father David. Where Solomon had multiplied (i.e., stored-up, hoarded), David had only added his 18+ wives. (In Genesis 25:1, "Then AGAIN Abraham took a wife... Keturah". The word,"AGAIN", there translates to add --or "augment"-- in the Hebrew. And, indeed, Abraham was adding his third wife Keturah to himself.) So, Solomon's sin was multiplying wives (which turned his heart away from God) while his father David had simply added wives. Hence, adding more than one wife is biblically acceptable (just as David did), whereas multiplying wives (just as Solomon did) is what was prohibited in Deuteronomy 17:14,17.

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