King James Version
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.English Standard Version
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.New International Version
But if the unbeliever leaves, let him do so. A believing man or woman is not bound in such circumstances; God has called us to live in peace.