1 Corinthians 7:4-8

The wife hath not power of her own body, but the husband: and likewise also the husband hath not power of his own body, but the wife.

Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.

But I speak this by permission, and not of commandment.

For I would that all men were even as I myself. But every man hath his proper gift of God, one after this manner, and another after that.

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