Matthew 19:10

His disciples say unto Him, if the case of a man with his wife be thus, it is not adviseable to marry:

1 Corinthians 7:1-2

Now as to the things concerning which ye wrote to me: it were good for a man not to touch a woman.

1 Corinthians 7:8

Now to the unmarried and widows I say, it is good for them to continue so, as I do.

1 Corinthians 7:26-28

I think then, that it is---better on account of the present distress,---that it is better, I say,

1 Corinthians 7:32-35

And I would have you without anxiety. Now he, that is unmarried, careth for the things of the Lord, how he may please the Lord; but he,

1 Corinthians 7:39-40

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:

1 Timothy 4:3

and enjoining abstinence from meats, which God hath created to be received with thanksgiving by those that believe and know the truth.

1 Timothy 5:11-15

But the younger widows refuse: for when they grow wanton against Christ, they will needs 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 as to the things concerning which ye wrote to me: it were good for a man not to touch a woman.
1 Timothy 4:3
and enjoining abstinence from meats, which God hath created to be received with thanksgiving by those that believe and know the truth.
1 Timothy 5:11
But the younger widows refuse: for when they grow wanton against Christ, they will needs marry: