Matthew 19:10

"If that is the position of a man in relation to his wife," answered the disciples, "it is better not to marry."

1 Corinthians 7:1-2

Now concerning the question in your letter. It is well for a man to have no intercourse with a woman,

1 Corinthians 7:8

But to the unmarried, and the widows, I say that it is well for them to remain as I am.

1 Corinthians 7:26-28

I think then, that in view of the time of suffering now imminent, it is best for a man to remain as he is.

1 Corinthians 7:32-35

So I want you to be free from all anxieties. An unmarried man is anxious about the Lord's business, how he may please the Lord;

1 Corinthians 7:39-40

A wife is bound to her husband during his lifetime; but if her husband dies, she is free to marry whomever she will, provided it be in the Lord.

1 Timothy 4:3

who discourage marriage, and enjoin abstinence from foods which God created to be received with thankfulness, by those who believe, and have a clear knowledge of the truth.

1 Timothy 5:11-15

But exclude from the list the younger widows; for where they have become wanton against Christ, they desire to marry,

Treasury of Scripture Knowledge

Summary

His disciples say unto him, If the case of the man be so with his wife, it is not good to marry.

Bible References

General references

1 Corinthians 7:1
Now concerning the question in your letter. It is well for a man to have no intercourse with a woman,
1 Timothy 4:3
who discourage marriage, and enjoin abstinence from foods which God created to be received with thankfulness, by those who believe, and have a clear knowledge of the truth.
1 Timothy 5:11
But exclude from the list the younger widows; for where they have become wanton against Christ, they desire to marry,