For the first, this site covers the question much more thoroughly than I ever could without plagiarizing.
bibleresearch.org/articles/alw2.htm
Could you point out where the article says which Jewish law in the OT accepted polygamy/polygyny?
You said that there was a Jewish law in the OT. What OT book, chapter and verse? I couldn’t find the answer in the article you cited.
Incidentally, I just researched the 613 Mitzvots (commandments/laws) of Judaism.
Nothing at all about acceptance of polygamy/polygyny…
Specifically, there are 22 that deal with marriage. I did not see anything that commanded polygamy/polygyny.
To honor father and mother (Ex. 20:12) (CCA41).
Not to smite a father or a mother (Ex. 21:15) (CCN44).
Not to curse a father or mother (Ex. 21:17) (CCN46).
To reverently fear father and mother (Lev. 19:3) (CCA42).
To be fruitful and multiply (Gen. 1:28) (CCA43).
That a eunuch shall not marry a daughter of Israel (Deut. 23:2) (CCN136).
That a mamzer shall not marry the daughter of a Jew (Deut. 23:3) (CCN137). See Prohibited Marriages and Illegitimate Children.
That an Ammonite or Moabite shall never marry the daughter of an Israelite (Deut. 23:4) (negative).
Not to exclude a descendant of Esau from the community of Israel for three generations (Deut. 23:8-9) (negative).
Not to exclude an Egyptian from the community of Israel for three generations (Deut. 23:8-9) (negative).
That there shall be no harlot (in Israel); that is, that there shall be no intercourse with a woman, without previous marriage with a deed of marriage and formal declaration of marriage (Deut. 23:18) (CCN133). See Marriage.
To take a wife by kiddushin, the sacrament of marriage (Deut. 24:1) (CCA44). See The Process of Marriage: Kiddushin and Nisuin.
That the newly married husband shall (be free) for one year to rejoice with his wife (Deut. 24:5) (affirmative).
That a bridegroom shall be exempt for a whole year from taking part in any public labor, such as military service, guarding the wall and similar duties (Deut. 24:5) (negative).
Not to withhold food, clothing or conjugal rights from a wife (Ex. 21:10) (CCN42). See The Marital Relationship.
That the woman suspected of adultery shall be dealt with as prescribed in the Torah (Num. 5:30) (affirmative).
That one who defames his wife’s honor (by falsely accusing her of unchastity before marriage) must live with her all his lifetime (Deut. 22:19) (affirmative).
That a man may not divorce his wife concerning whom he has published an evil report (about her unchastity before marriage) (Deut. 22:19) (negative).
To divorce by a formal written document (Deut. 24:1) (affirmative). See The Process of Obtaining a Divorce.
That one who divorced his wife shall not remarry her, if after the divorce she had been married to another man (Deut. 24:4) (CCN134). See Divorce.
That a widow whose husband died childless must not be married to anyone but her deceased husband’s brother (Deut. 25:5) (CCN135) (this is only in effect insofar as it requires the procedure of release below).
To marry the widow of a brother who has died childless (Deut. 25:5) (this is only in effect insofar as it requires the procedure of release below ) (CCA45).
That the widow formally release the brother-in-law (if he refuses to marry her) (Deut. 25:7-9) (CCA46).
From
Judaism 101.
Is there another law that you are aware of that commanded polygamy in the OT?