1. The command not to divorce
10 To the married I give this charge (not I, but the Lord): the wife should not separate from her husband 11 (but if she does, she should remain unmarried or else be reconciled to her husband), and the husband should not divorce his wife. 1 Corinthians 7:10-11 (ESV)
11 And he said to them, “Whoever divorces his wife and marries another commits adultery against her, 12 and if she divorces her husband and marries another, she commits adultery.” Mark 10:11-12 (ESV)
9 And I say to you: whoever divorces his wife, except for sexual immorality, and marries another, commits adultery.” Matthew 19:9 (ESV)
2. The consecration that rules out divorce
12 To the rest I say (I, not the Lord) that if any brother has a wife who is an unbeliever, and she consents to live with him, he should not divorce her. 13 If any woman has a husband who is an unbeliever, and he consents to live with her, she should not divorce him. 14 For the unbelieving husband is made holy because of his wife, and the unbelieving wife is made holy because of her husband. Otherwise your children would be unclean, but as it is, they are holy.
1 Corinthians 7:12-14 (ESV)
1 Likewise, wives, be subject to your own husbands, so that even if some do not obey the word, they may be won without a word by the conduct of their wives, 2 when they see your respectful and pure conduct. 1 Peter 3:1-2 (ESV)
34 “Do not think that I have come to bring peace to the earth. I have not come to bring peace, but a sword. 35 For I have come to set a man against his father, and a daughter against her mother, and a daughter-in-law against her mother-in-law.36 And a person’s enemies will be those of his own household. 37 Whoever loves father or mother more than me is not worthy of me, and whoever loves son or daughter more than me is not worthy of me. Matthew 10:34-37 (ESV)
14 Do not be unequally yoked with unbelievers. For what partnership has righteousness with lawlessness? Or what fellowship has light with darkness? 2 Corinthians 6:14 (ESV)
1 When he came down from the mountain, great crowds followed him. 2 And behold, a leper came to him and knelt before him, saying, “Lord, if you will, you can make me clean.” 3 And Jesus stretched out his hand and touched him, saying, “I will; be clean.” And immediately his leprosy was cleansed. Matthew 8:1-3 (ESV)
19 Or do you not know that your body is a temple of the Holy Spirit within you, whom you have from God? . . . 1 Corinthians 6:19 (ESV)
3. The concession for divorce
15 But if the unbelieving partner separates, let it be so. In such cases the brother or sister is not enslaved. God has called you to peace. 16 For how do you know, wife, whether you will save your husband? Or how do you know, husband, whether you will save your wife? 1 Corinthians 7:15-16 (ESV)
16 Wife, for all you know, you might save your husband. Husband, for all you know, you might save your wife. 1 Corinthians 7:16 (CSB)