New Revised Standard Version
For the unbelieving husband is made holy through his wife, and the unbelieving wife is made holy through her husband. Otherwise, your children would be unclean, but as it is, they are holy.

Contemporary English Version
Your husband or wife who isn't a follower is made holy by having you as a partner. This also makes your children holy and keeps them from being unclean in God's sight.

New American Bible
For the unbelieving husband is made holy through his wife, and the unbelieving wife is made holy through the brother. Otherwise your children would be unclean, whereas in fact they are holy.

Douay-Rheims Bible
For the unbelieving husband is sanctified by the believing wife: and the unbelieving wife is sanctified by the believing husband. Otherwise your children should be unclean: but now they are holy.

For the unbelieving husband is sanctified by the believing wife: and the unbelieving wife is sanctified by the believing husband. Otherwise your children should be unclean: but now they are holy.

the unbelieving husband.

1 Corinthians 6:15-17 Know you not that your bodies are the members of Christ? Shall I then take the members of Christ and make them the members of an harlot? God forbid! . . .

Ezra 9:1,2 And after these things were accomplished, the princes came to me, saying: The people of Israel, and the priests and Levites have not separated themselves from the people of the lands, and from their abominations, namely, of the Chanaanites, and the Hethites, and the Pherezites, and the Jebusites, and the Ammonites, and the Moabites, and the Egyptians, and the Amorrhites. . . .

1 Timothy 4:5 For it is sanctified by the word of God and prayer.

Titus 1:15 All things are clean to the clean: but to them that are defiled and to unbelievers, nothing is clean: but both their mind and their conscience are defiled.

else.

Ezra 9:2 For they have taken of their daughters for themselves and for their sons, and they have mingled the holy seed with the people of the lands. And the hand of the princes and magistrates hath been first in this transgression.

Isaiah 52:1 Arise, arise, put on thy strength, O Sion, put on the garments of thy glory, O Jerusalem, the city of the Holy One: for henceforth the uncircumcised, and unclean shall no more pass through thee.

Malachi 2:15,16 Did not one make her, and she is the residue of his spirit? And what doth one seek, but the seed of God? Keep then your spirit, and despise not the wife of thy youth. . . .

Acts 10:23 Then bringing them in, he lodged them. And the day following, he arose and went with them: and some of the brethren from Joppe accompanied him.

Romans 11:16 For if the firstfruit be holy, so is the lump also: and if the root be holy, so are the branches.