1 Corinthians 7:11-12

7:11 (but if she does, let her remain unmarried, or be reconciled to her husband), and a husband should not divorce his wife.

7:12 To the rest I say – I, not the Lord ¹  – if a brother has a wife who is not a believer and she is happy to live with him, he should not divorce her.

1 Corinthians 7:22

7:22 For the one who was called in the Lord as a slave is the Lord’s freedman. In the same way, the one who was called as a free person is Christ’s slave.

[7:12]  ¹ sn I, not the Lord. Here and in v. 10 Paul distinguishes between his own apostolic instruction and Jesus’ teaching during his earthly ministry. In vv. 12-16, Paul deals with a situation about which the Lord gave no instruction in his earthly ministry.