Polygamy is the most biblical form of marriage.
No its not.
1 Corinthians 7:2 ESV
But because of the temptation to sexual immorality, each man should have his own wife and each woman her own husband.
Deuteronomy 17:17 ESV
And he shall not acquire many wives for himself, lest his heart turn away, nor shall he acquire for himself excessive silver and gold.
1 Corinthians 7:1-40 ESV
Now concerning the matters about which you wrote: “It is good for a man not to have sexual relations with a woman.” But because of the temptation to sexual immorality, each man should have his own wife and each woman her own husband. The husband should give to his wife her conjugal rights, and likewise the wife to her husband. For the wife does not have authority over her own body, but the husband does. Likewise the husband does not have authority over his own body, but the wife does. Do not deprive one another, except perhaps by agreement for a limited time, that you may devote yourselves to prayer; but then come together again, so that Satan may not tempt you because of your lack of self-control. ...
1 Timothy 3:2 ESV
Therefore an overseer must be above reproach, the husband of one wife, sober-minded, self-controlled, respectable, hospitable, able to teach,
Mark 10:8 ESV
And the two shall become one flesh.’ So they are no longer two but one flesh.
1 Timothy 3:1-16 ESV
The saying is trustworthy: If anyone aspires to the office of overseer, he desires a noble task. Therefore an overseer must be above reproach, the husband of one wife, sober-minded, self-controlled, respectable, hospitable, able to teach, not a drunkard, not violent but gentle, not quarrelsome, not a lover of money. He must manage his own household well, with all dignity keeping his children submissive, for if someone does not know how to manage his own household, how will he care for God's church?...
Mark 10:7 ESV
‘Therefore a man shall leave his father and mother and hold fast to his wife,
Leviticus 18:18 ESV
And you shall not take a woman as a rival wife to her sister, uncovering her nakedness while her sister is still alive.
Matthew 19:9 ESV
And I say to you: whoever divorces his wife, except for sexual immorality, and marries another, commits adultery.”
Matthew 5:32 ESV
But I say to you that everyone who divorces his wife, except on the ground of sexual immorality, makes her commit adultery, and whoever marries a divorced woman commits adultery.
Exodus 21:10 ESV
If he takes another wife to himself, he shall not diminish her food, her clothing, or her marital rights.
Genesis 2:24 ESV
Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh.
Genesis 30:1-43 ESV
When Rachel saw that she bore Jacob no children, she envied her sister. She said to Jacob, “Give me children, or I shall die!” Jacob's anger was kindled against Rachel, and he said, “Am I in the place of God, who has withheld from you the fruit of the womb?” Then she said, “Here is my servant Bilhah; go in to her, so that she may give birth on my behalf, that even I may have children through her.” So she gave him her servant Bilhah as a wife, and Jacob went in to her. And Bilhah conceived and bore Jacob a son. ...
Matthew 19:3-6 ESV
And Pharisees came up to him and tested him by asking, “Is it lawful to divorce one's wife for any cause?” He answered, “Have you not read that he who created them from the beginning made them male and female, and said, ‘Therefore a man shall leave his father and his mother and hold fast to his wife, and the two shall become one flesh’?So they are no longer two but one flesh. What therefore God has joined together, let not man separate.”
1 Corinthians 6:16 ESV
Or do you not know that he who is joined to a prostitute becomes one body with her?For, as it is written, “The two will become one flesh.”
Romans 7:2 ESV
For a married woman is bound by law to her husband while he lives, but if her husband dies she is released from the law of marriage.
Mark 10:11-12 ESV
And he said to them, “Whoever divorces his wife and marries another commits adultery against her, and if she divorces her husband and marries another, she commits adultery.”