'Unmarried' in the Bible

I say therefore to the unmarried and widows, It is good for them if they abide even as I.

But and if she depart, let her remain unmarried, or be reconciled to her husband: and let not the husband put away his wife.

But I would have you without carefulness. He that is unmarried careth for the things that belong to the Lord, how he may please the Lord:

There is difference also between a wife and a virgin. The unmarried woman careth for the things of the Lord, that she may be holy both in body and in spirit: but she that is married careth for the things of the world, how she may please her husband.