1 Corinthians 7:10-12

Moffatt(i) 10 For married people these are my instructions (and they are the Lord's, not mine). A wife is not to separate from her husband — 11 if she has separated, she must either remain single or be reconciled to him — and a husband must not put away his wife. 12 To other people I would say (not the Lord): — if any brother has a wife who is not a believer, and if she consents to live with him, he must not put her away;