1 Corinthians 7:15

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.

But if the unbeliever leaves, let him go. The believing brother or sister is not bound in such cases. God has called you to live in peace.

16 How do you know, wife, whether you will save your husband? Or how do you know, husband, whether you will save your wife?

17 Regardless, each one should lead the life that the Lord has assigned to him and to which God has called him. This is what I prescribe in all the churches.

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

Compare

BSB
But if the unbeliever leaves, let him go. The believing brother or sister is not bound in such cases. God has called you to live in peace.
KJV
But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.
WEB
Yet if the unbeliever departs, let there be separation. The brother or the sister is not under bondage in such cases, but God has called us in peace.
ASV
Yet if the unbelieving departeth, let him depart: the brother or the sister is not under bondage in such [cases]: but God hath called us in peace.
DARBY
But if the unbeliever go away, let them go away; a brother or a sister is not bound in such [cases], but God has called us in peace.
BLB
But if the unbeliever separates himself, let him separate himself. The brother or the sister is not bound in such [cases]. But God has called you⁺ in peace.
ÅB
Men dersom den vantro skiller seg, da får han så gjøre; broren eller søsteren er ikke i slaveri i slike ting, men Gud har kalt oss til fred.
OTB
Hvis den ikke-troende partneren velger å forlate, la dem gjøre det; broren eller søsteren er ikke bundet i slike omstendigheter, men Gud har kalt oss til å leve i fred.
B1930
Men dersom den vantro skiller sig, da får han så gjøre; broren eller søsteren er ikke trælbundet i slike ting, men Gud har kalt oss til fred.

Study notes (Tyndale)

Original text and word study

Cross references