What does the Holy Bible say about Plural; Marriage? Let us read from the sacred pages and discover what God says about it.
And David took him more concubines and wives out of Jerusalem,after he was come from Hebron: and there were yet sons and daughters born to David.
There is NO CONDEMNATION here.
1 Chronicles 3:1-9
These were the sons of David born to him in Hebron: The firstborn was Amnon the son of Ahinoam  of Jezreel; the second, Daniel the son of Abigail  of Carmel; 2 the third, Absalom the son of Maakah  daughter of Talmai king of Geshur; the fourth, Adonijah  the son of Haggith; the fifth, Shephatiah the son of Abital ; and the sixth, born to him , by his wife Eglah. 
These six children were born to David in Hebron, where he reigned seven years and six months. David reigned in Jerusalem thirty-three years, and these were the children born to him there: Shammua, Shobab, Nathan and Solomon. These four were by Bathsheba daughter of Ammiel. There were also Ibhar, Elishua, Eliphelet, Nogah, Nepheg, Japhia, Elishama, Eliada and Eliphelet—nine in all. All these were the sons of David, besides his sons by his concubines. And Tamar was their sister.
1 Chronicles 14:3-9
Now these were the sons of David, which were born unto him in Hebron; the firstborn Amnon, of Ahinoam  the Jezreelitess; the second Daniel, of Abigail  the Carmelitess: The third, Absalom the son of Maachah  the daughter of Talmai king of Geshur: the fourth, Adonijah the son of Haggith : The fifth, Shephatiah of Abital: the sixth, born to him by Eglah  his wife. These six were born unto him in Hebron; and there he reigned seven years and six months: and in Jerusalem he reigned thirty and three years. And these were born unto him in Jerusalem; Shimea, and Shobab, and Nathan, and Solomon, four, of Bathshua the daughter of Ammiel: Ibhar also, and Elishama, and Eliphelet, And Nogah, and Nepheg,and Japhia, And Elishama, and Eliada, and Eliphelet, nine. These were all the sons of David, beside the sons of the concubines, and Tamar their sister.
Again, there is NO hint of CONDEMNATION for his plural wives, merely a recounting of the children each of them bore to him.
1 Kings 11:3:
And [King Solomon] had seven hundred wives, princesses,and three hundred concubines: and his wives turned away his heart.
'Concubine' has been interpreted by Bible scholars to indicate a SECONDARY WIFE. There is NO CONDEMNATION from God of Solomon for the number of wives he had, only the observation indicating some of his non-Israelite wives turned away his heart from Israel’s God.
2 Chronicles 11:21
And Rehoboam loved Maachah the daughter of Absalom above ALL HIS WIVES and his concubines: (for he took EIGHTEEN WIVES, and SIXTY CONCUBINES; and begat twenty and eight sons, and threescore daughters.)
Again, we find NO hint of CONDEMNATION! Why not? BECAUSE God does not condemn plural marriage. On the contrary, he commands it!
10 When thou goest forth to war against thine enemies, and the LORD thy God hath delivered them into thine hands, and thou hast taken them captive, 11 And seest among the captives a beautiful woman, and hast a desire unto her, that thou wouldest have her to thy wife; 12 Then thou shalt bring her home to thine house, and she shall shave her head, and pare her nails; 13 And she shall put the raiment of her captivity from off her, and shall remain in thine house, and bewail her father and her mother a full month: and after that thou shalt go in unto her, and be her husband, and she shall be thy wife.…
15 IF A MAN HAVE TWO WIVES, one beloved, and another hated, and they have born him children, both the beloved and the hated; and if the firstborn son be hers that was hated: 16 Then it shall be, when he maketh his sons to inherit that which he hath,that he may not make the son of the beloved firstborn before the son of the hated, which is indeed the firstborn.
Plural marriage is seen here not only to be encouraged, but provision for the children of such marriages is enjoined in the Law.The Old Testament frequently mentions plural marriage as acceptable for the Israelites, and many of the prophets and patriarchs had multiple wives, including Lamech, Abraham, Jacob,Esau, Gideon, Saul, David, Solomon, Rehoboam, Elkanah, Ashur,Abijah and Jehoiada.
Some suggest that Moses had a second wife in Tharbis. In addition to the many examples of plural marriage, the Pentateuch lists guidelines and rules concerning the taking of multiple wives; noting as we have seen that,
IF HE TAKES ANOTHER WIFE TO HIMSELF, he shall not diminish her food,her clothing, or her marital rights.
Levirate Marriage makes it a legal obligation for men whose brothers have left widows TO MARRY THEM NOTWITHSTANDING THE FACT THEY ARE ALREADY MARRIED, and support their families.
THIS LAW IMPOSES A LEGAL AND RELIGIOUS OBLIGATION ON Israelite MEN TO PRACTICE POLYGAMY [Plural marriage].
5 If brethren dwell together, and one of them die, and have no child, the wife of the dead shall not marry without unto a stranger:her husband's brother shall go in unto her, and take her to him to wife, and perform the duty of an husband's brother unto her. 6 And it shall be, that the firstborn which she beareth shall succeed in the name of his brother which is dead, that his name be not put out of Israel. 7 And if the man like not to take his brother's wife, then let his brother's wife go up to the gate unto the elders, and say, My husband's brother refuseth to raise up unto his brother a name in Israel, he will not perform the duty of my husband's brother. 8Then the elders of his city shall call him, and speak unto him: and if he stand to it, and say, I like not to take her; 9 Then shall his brother's wife come unto him in the presence of the elders, and loose his shoe from off his foot, and spit in his face, and shall answer and say, So shall it be done unto that man that will not build up his brother's house. 10 And his name shall be called in Israel, The house of him that hath his shoe loosed. [Deut 25:5–10]
How then can anyone use the Holy Bible argue against plural marriage [polygamy] and claim it is unbiblical? Why do such people use facile argument out of context to press a non-existent point, excusing their ignorance by saying, in effect, that plural marriage is unbiblical? Their argument runs:
"Although some men in Bible times had many wives, this was not God’s will, according to Deuteronomy 17:14-18. Instead of polygamy, the Bible teaches the sacredness of the commitment of one man and one woman to each other until death separates them." [Clearly, this is a nonsense]
We have seen by the previous passages that such pontificators are wrong and apparently ignorant of what the Bible, that they say is the inerrant word of God says on the subjects, since polygamy is encouraged by the will of God, and the Bible says so. Some Anti-Mormons that are ignorant of Mormonism even insist
"It is interesting that Mormons now deny their church ever taught this doctrine [polygamy]."
What is interesting is that such Anti-Mormons provide no references for this untruthful and nonsensical claim. Hardly surprising because it is not true.
Mormons know their history and acknowledge plural marriage as taught and practiced during about fifty years of the first Mormon century, and was terminated to conform to the ruling of the United States Supreme Court that held the Edmunds-Tucker law to be constitutional.The braggadocio of Anti-Mormons includes such obnoxious and unfounded statements as:
It is obvious that the Mormons have rewritten the Bible to match their theology rather than taking their theology from the Bible. [claim by 'Silent' Professor Berry, et al]
What is obvious is that plural marriage has been positively shown from scripture to be approved, even encouraged and commanded by the word of God. It is obvious that Anti-Mormons do not know their Bibles and are ignorant of its content. They do not know the above passages that approve and prescribe plural marriages with Almighty God's authority. Little wonder that the Bible has been called “The Book That Nobody Knows!”
NB: Not only do these critics fail the test of bible knowledge, but they do not know Mormonism. All they know, or think they know, about Mormonism, the Restored Church of JESUS CHRIST of Latter-day Saints, they have dredged up from the murky depths of scurrilous books written by prevaricators and knaves such as Walter R Martin, Bill Schnoebelen, the Tanners, John Smith, Wesley P Walters, Lori MacGregor, and many others that practice their arcane and occult arts. God help them.
A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behaviour, given to hospitality, apt to teach; [1 Timothy 3:2]
Some argue that Paul insists here that bishops have no more than one wife. However, the passage is open to other interpretations, one of which is that it premises that a bishop must be the husband of at least one wife. That is, he must be married. Plural marriage was not unknown among Jews and Christians at the time the New Testament speaks of, but neither Jesus, the evangelists, or the apostles speak against it.