I noticed that you quoted my post in your reply so I am interpreting that to mean that the scripture references you posted below my quote are to answer my post. Those scriptures do not address my post.
My post was asking anyone to address Solomon, who had 700 wives, being an alleged polygamist and yet be blessed by God.
Solomon was never instructed by God not to have multiple wives. God instructed Solomon to keep his heart upright and to walk before Him as his father David did and if he did so his throne would be established over Israel forever (I Kings 9:4-5). If Solomon or his sons turned from God to serve other gods (I Kings 9:6-7) then He would cut Israel off. Solomon was good until I Kings 11. He loved many foreign (strange) women from the nations that God told the children of Israel NOT to marry (Deuteronomy 7:3,4). Solomon disobeyed that order, married the women and when he was old, they turned his heart from God and he served and worshiped other gods and God exacted His punishment for Solomon's disobedience.
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However, my post was slightly OT as the OP wanted to know what happens when someone who has or has had multiple spouses comes to Christ, which spouse do they keep or stay with? The OP mentioned other cultures, and she posed a good question for thought. If it is accepted in your society to have more than one wife, and you accept Christ, which wife do you keep since Christians believe in one husband, one wife.
One husband, one wife is what led me to ask my question. God would have established Solomon's throne forever had Solomon worshiped only God. There was nothing in God's promise that discussed multiple marriages, only forbidding Solomon from intermarrying with women from the forbidden tribes or groups.
David had multiple wives (2 Samuel 5:13, I Chronicles 3:1-9) and he is known as being a man after God's heart. God loved David and he Him. David's throne would have been established through Solomon had Solomon obeyed. God still had to get Jesus in the earth so He gave one tribe of Israel to Solomon's son for David's sake (I Kings 11:13). If God only allows one husband and one wife, He would not have blessed either of them as they both had multiple wives. The bible is clear that David sinned when he murdered Uriah so that he could have Bathsheba.
Christians use Genesis and the no adultery commandment to support our belief and position that polygamy is a sin. But I have not come across one verse with specific instructions from God (specifically God, not the apostolic writings in the NT) to only have one wife.
Deuteronomy 21:15 teaches how to inherit the first born son of two wives, one wife who is loved the other is not loved. This scripture does not condemn multiple wives. Deuteronomy 17:17 teaches that the King of the people should not have many* wives; why? because they will turn his heart to be led astray - Solomon. Didn't say anything about the people.
*apparently there is a difference between many wives (meaning a lot) and multiple wives (meaning more than one). David had eight wives = multiple (not sure if simultaneously or consecutively) and Solomon 700 = many.
Jesus taught against divorce in Matthew, but Jesus did not say it was wrong to have more than one wife. Jesus taught that when one marries, the two flesh become one, but not only one man marry only one wife which implies a man can become one flesh with more than one woman. Jesus also said that He did not come to abolish the law but to fulfill it and the OT law allowed for multiple wives.
In Genesis, God created man and woman. Now, there is always the question who "knew" whom to populate the earth. If you take the position of one man Adam and one woman Eve, then one must postulate that they "knew" each other and their children in order to populate the earth. However, if you know that the original text Adam is not just a name for an individual man, but the name of the gender man and that Eve is not just the name of an individual woman but is the name of the gender female, then one can postulate that God created the gender male and the gender female and several individuals in each gender to populate the earth. In either case, Adam and Eve (individual or gender) were never "married" as we know it today. Meaning they did not meet, fellowship (date) get engaged and then married. The were created, and as there was no sin in the earth (yet), they knew what their role was and fulfilled it. However, Genesis does not specify one husband one wife.
Do NOT take what I've posted to be my belief or my opinion on God's will. I BELIEVE that there should only be one husband, one wife and that just because I have found no specific word from God or Jesus to the contrary that does not mean that it is not God's will.
This thread is a good example that goes back to that thread on believing every word in the bible. Wile I trust God that everything in the bible as we know it contains everything believers need to live holy, I also know that it is quite possible that things could have been omitted in an attempt to benefit those in power politically and religiously at the time the bible was translated for the people to read. But I already said some of that in the other thread.
As usual, please correct any errors I may have. Thanks.