Marriage laws taught in the scriptures which Joseph Smith transgressed:

1. No concubines: Jacob 2:27

Smith had “concubines?” That’s news to me.

Smith practiced polygamy.

Jacob 2:27 Wherefore, my brethren, hear me, and hearken to the word of the Lord: For there shall not any man among you have save it be one wife; and concubines he shall have none;
28 For I, the Lord God, delight in the chastity of women. And whoredoms are an abomination before me; thus saith the Lord of Hosts.
29 Wherefore, this people shall keep my commandments, saith the Lord of Hosts, or cursed be the land for their sakes.
30 For if I will, saith the Lord of Hosts, raise up seed unto me, I will command my people; otherwise they shall hearken unto these things.

 

2. No marrying sisters: Leviticus 18:18

Leviticus does not apply to Christians:

Romans 10:4 says, “Christ is the end of the law.” Colossians 2:13-14 says that God "forgave us all our sins, having canceled the charge of our legal indebtedness, which stood against us and condemned us; he has taken it away, nailing it to the cross.”

3. No polyandry: Romans 7:3

From Mormonr

Did Joseph have sex with his plural wives who had legal husbands?

Possibly, though it seems unlikely that sexual polyandry would have gone undetected or uncontested by the legal husband, especially ones who were disaffected, excommunicated, or never Latter-day Saints.[179] There is some historical evidence that may support this arrangement for two of Joseph's polyandrous marriages;[180] however, historians disagree on this subject.[181][182]

              https://mormonr.org/qnas/VvSJBb/joseph_smith_and_polygamy

 

4. No marrying mother/daughter: Leviticus 20:14

 

Leviticus does not apply to Christians:

Romans 10:4 says, “Christ is the end of the law.” Colossians 2:13-14 says that God "forgave us all our sins, having canceled the charge of our legal indebtedness, which stood against us and condemned us; he has taken it away, nailing it to the cross.”

 

5. No marrying virgins without your wife’s consent: D&Cov 132:61

Smith does not violate D+C 132:63

Or Doctrine and Covenants 132:39

David’s wives and concubines were given unto him of me, by the hand of Nathan, my servant, and others of the prophets who had the keys of this power; and in none of these things did he sin against me save in the case of Uriah and his wife;

6. No cross dressing sex/marriage: Deut. 22:5

Did Smith Cross dress?

Deuteronomy does not apply to Christians:

Romans 10:4 says, “Christ is the end of the law.” Colossians 2:13-14 says that God "forgave us all our sins, having canceled the charge of our legal indebtedness, which stood against us and condemned us; he has taken it away, nailing it to the cross.”

 

7. No adultery, Lev 20:10

Leviticus does not apply to Christians:

 

Romans 10:4 says, “Christ is the end of the law.” Colossians 2:13-14 says that God "forgave us all our sins, having canceled the charge of our legal indebtedness, which stood against us and condemned us; he has taken it away, nailing it to the cross.”

 

8. No trying to divorce your wife, Matthew 19:9,

LDS polygamy allowed rules for divorce. Unlike Biblical polygamy that did not allow for divorce.

It allowed for consent to marry to the women and allowed for divorce for the women.

9. No commiting adultery (while husband traveling), Proverbs 7:18-19,

From Mormonr

 

Did Joseph have sex with his plural wives who had legal husbands?

 

Possibly, though it seems unlikely that sexual polyandry would have gone undetected or uncontested by the legal husband, especially ones who were disaffected, excommunicated, or never Latter-day Saints.[179] There is some historical evidence that may support this arrangement for two of Joseph's polyandrous marriages;[180] however, historians disagree on this subject.[181][182]

https://mormonr.org/qnas/VvSJBb/joseph_smith_and_polygamy

 

10. No forgiveness for second strike adultery, D&Cov 42:26

D+C 42:25-26

25 But he that has committed adultery and repents with all his heart, and forsaketh it, and doeth it no more, thou shalt forgive;

26 But if he doeth it again, he shall not be forgiven, but shall be cast out.

Smith practiced polygamy.

 

11. No fornication with the maid, 1 Corinthians 7:2,

Smith practiced polygamy.

12. No acquiring many wives after becoming king, Deut 17:15-17

This advice would have been handy for Biblical leaders.

Deuteronomy does not apply to Christians:

Romans 10:4 says, “Christ is the end of the law.” Colossians 2:13-14 says that God "forgave us all our sins, having canceled the charge of our legal indebtedness, which stood against us and condemned us; he has taken it away, nailing it to the cross.”