2 Corinthians 6:14

Do not get into close and incongruous relations with unbelievers. What partnership can uprightness have with iniquity, or what can light have to do with darkness?

1 Corinthians 7:14

For the husband who is not a believer is consecrated through union with his wife, and the woman who is not a believer is consecrated through union with her Christian husband, for otherwise your children would be unblessed, but, as it is, they are consecrated.

Treasury of Scripture Knowledge

Summary

For they have taken of their daughters for themselves, and for their sons: so that the holy seed have mingled themselves with the people of those lands: yea, the hand of the princes and rulers hath been chief in this trespass.

The holy seed

Bible References

The holy seed

1 Corinthians 7:14
For the husband who is not a believer is consecrated through union with his wife, and the woman who is not a believer is consecrated through union with her Christian husband, for otherwise your children would be unblessed, but, as it is, they are consecrated.

Mingled

2 Corinthians 6:14
Do not get into close and incongruous relations with unbelievers. What partnership can uprightness have with iniquity, or what can light have to do with darkness?