1 Corinthians 7:12

But to the rest I say, not the Lord, that if any brother has a wife who is an unbeliever, and she consents to live with him, he must not divorce her.

1 Corinthians 7:6

But this I say by way of concession, not of command.

2 Corinthians 11:17

What I am saying, I am not saying as the Lord would, but as in foolishness, in this confidence of boasting.

Ezra 10:2-3

Shecaniah the son of Jehiel, one of the sons of Elam, said to Ezra, “We have been unfaithful to our God and have married foreign women from the peoples of the land; yet now there is hope for Israel in spite of this.

Ezra 10:11-19

Now therefore, make confession to the Lord God of your fathers and do His will; and separate yourselves from the peoples of the land and from the foreign wives.”

1 Corinthians 7:25

Now concerning virgins I have no command of the Lord, but I give an opinion as one who by the mercy of the Lord is trustworthy.

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

If

Ezra 10:2
Shecaniah the son of Jehiel, one of the sons of Elam, said to Ezra, “We have been unfaithful to our God and have married foreign women from the peoples of the land; yet now there is hope for Israel in spite of this.

General references

Luke 16:18
Everyone who divorces his wife and marries another commits adultery, and he who marries one who is divorced from a husband commits adultery.
1 Corinthians 11:11
However, in the Lord, neither is woman independent of man, nor is man independent of woman.