1 Corinthians 7:12

10 To the married I give this command (not I, but the Lord): A wife must not separate from her husband.

11 But if she does, she must remain unmarried or else be reconciled to her husband. And a husband must not divorce his wife.

To the rest I say this (I, not the Lord): If a brother has an unbelieving wife and she is willing to live with him, he must not divorce her.

13 And if a woman has an unbelieving husband and he is willing to live with her, she must not divorce him.

14 For the unbelieving husband is sanctified through his believing wife, and the unbelieving wife is sanctified through her believing husband. Otherwise your children would be unclean, but now they are holy.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
To the rest I say this (I, not the Lord): If a brother has an unbelieving wife and she is willing to live with him, he must not divorce her.
KJV
But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.
WEB
But to the rest I—not the Lord—say, if any brother has an unbelieving wife, and she is content to live with him, let him not leave her.
ASV
But to the rest say I, not the Lord: If any brother hath an unbelieving wife, and she is content to dwell with him, let him not leave her.
DARBY
But as to the rest, *I* say, not the Lord, If any brother have an unbelieving wife, and *she* consent to dwell with him, let him not leave her.
BLB
Now to the rest I say (I, not the Lord): If any brother has an unbelieving wife, and she consents to dwell with him, let him not send her away.
ÅB
Til de andre sier jeg, ikke Herren: Dersom en bror har en vantro hustru, og hun samtykker i å bo hos ham, da skille han seg ikke fra henne!
OTB
Til de andre sier jeg, ikke Herren, at hvis noen bror har en kone som ikke er troende og hun er villig til å leve med ham, skal han ikke skille seg fra henne.
B1930
Til de andre sier jeg, ikke Herren: Dersom en bror har en vantro hustru, og hun samtykker i å bo hos ham, da skille han sig ikke fra henne!

Study notes (Tyndale)

Original text and word study

Cross references