But if the unbeliever departs, let him depart; a brother or a sister is not under bondage in such cases. But God has called us to peace.
1 Corinthians 7:15
Surrounding context
7:14 For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband; otherwise your children would be unclean, but now they are holy.
7:15 But if the unbeliever departs, let him depart; a brother or a sister is not under bondage in such cases. But God has called us to peace.
7:16 For how do you know, O wife, whether you will save your husband? Or how do you know, O husband, whether you will save your wife?