Is polygyny allowed in the New Testament? Absolutely! All one has to do is turn to 1 Cor 7:39 to see that Paul based his teaching on the Mosaic Law.
1Co 7:39 The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.
Paul appeals to the Law for marriage and other teachings as well, read 1Cor 9:8, 20-21 which by the way notice in 21 he clarifies his statement of being without law to the gentiles with a phrase that is ignored, “ being not without law to God, but under the law to Christ”.
1Cor 14:21, 34, Paul new the law was given by God and he had no problem with teaching his audience the principals contained in it that applied to them.
Now, back to the subject, he appeals to the law to make a summation of what he taught in verse 39. I want you to notice that he binds the wife exclusively to her husband as long as he lives but not the husband. In the Law that Paul is referencing a man was allowed to take another wife if his first wife was living. The husband was not bound to one wife for Life, but the wife was, and if she married another she was charged with adultery. Thus, Paul himself is accepting the Law as valid for marital teaching.
Paul is not referring to any specific law; he is summing up the thrust of the Law, and when he says bound by the Law he is speaking of the whole law concerning the issue of marriage. Here is where it gets interesting certainly he addresses the husbands in light of the Law as he did wives. Let us look at what Paul says to believers concerning marriage, divorce and remarriage.
1Co 7:10 And unto the married I command, yet not I, but the Lord, Let not the wife depart from her husband:
1Co 7:11 But and if she depart, let her remain unmarried, or be reconciled to her husband: and let not the husband put away his wife.
Wives do not separate from your husband but if you do, remain unmarried, or return to your husband. Husbands do not divorce your wife.
This scripture places a stipulation of no remarriage in this case on the wife, but not on the husband. Keep in mind Paul is teaching marriage from the Law. And in the Law a man could marry more than one wife he was not bound to exclusivity as the wife was. That is why Paul didn’t place the same stipulation on the husband. The husband here can marry again if he so chooses, but if his wife wants to return, he can’t reject her if she has remained sexually faithful to him. If he marries another woman his first wife is still bound to the covenant. This is allowance for polygyny in the New Testament and in a certain situation mandated. Paul is clearly instructing out of the Law. In fact when he strays from the Law he says “I command not the Lord”. It seems Paul had more confidence in the Law than we are led to believe.
1. Paul applies the Law to New Covenant believers concerning marriage, thus making it New Covenant teaching.
2. This shows that New Covenant teaching is perfectly consistent with Old Covenant teaching on marriage.
3. This also shows the thought that we are ingrained with, that the New Covenant teaching on marriage corrects the Olds errors, are false and are contrived by man.
4. This shows that God’s will is consistent through history and should make one question those who put God’s Covenants add odds with one another. Progressive revelation always advanced a theme and produces harmony, not corrected it and produced contradiction.
5. The problem we have is that we approach scripture with preconceived ideas thus inserting our ideas rather than extracting their ideas.
6. If one looks at the whole of scripture you can clearly see that the roles of husband and wife are different so the rules are different. We cannot apply all to both there are certain rules that apply to the husband, certain rules that apply to the wife and certain rules that apply to both. We must be faithful to the Word of God, for our growth and theirs as well. The fact is our marriages are in shambles amongst the church because we as teachers haven’t adequately explained the roles, rules and responsibilities’ to God’s flock. As long as we remain in the dark about this, it will continue to be the blind leading the blind.
7. I could go on and on like this but I will stop here and say one last thing. Even though you can clearly see Paul was teaching from the Law on marriage, (he states that) and presents it as a New Covenant binding principal, We are not left to this only, there are many contextual factors also to establish that stipulations and omission of stipulations are not by accident, or lack of foresight but on purpose to remain consistent with the Law. I am open to discussion or debate concerning exegesis concerns one might have, but let me assure you that I am saving the clinchers for a book.