1 Corinthians 7:39

A woman is bound to her husband during his lifetime; but if he dies, she is free to marry anyone she pleases ??only, it must be a Christian.

Romans 7:2-3

Thus a married woman is bound by law to her husband while he is alive; but if the husband dies, she is done with the law of 'the husband.'

1 Corinthians 7:15

(Should the unbelieving partner be determined to separate, however, separation let it be; in such cases the Christian brother or sister is not tied to marriage.) It is to a life of peace that God has called us.

1 Corinthians 7:10

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.

2 Corinthians 6:14-16

[Keep out of all incongruous ties with unbelievers. What have righteousness and iniquity in common, or how can light associate with darkness?

Treasury of Scripture Knowledge

Summary

The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.

General references

Bible References

Wife

1 Corinthians 7:10
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.
Romans 7:2
Thus a married woman is bound by law to her husband while he is alive; but if the husband dies, she is done with the law of 'the husband.'

Only

2 Corinthians 6:14
[Keep out of all incongruous ties with unbelievers. What have righteousness and iniquity in common, or how can light associate with darkness?

General references

Matthew 19:10
The disciples said to him, "If that is a man's position with his wife, there is no good in marrying."