1 Corinthians 7:2-6

But because of sexual immoralities, each man is to have his own wife, and each woman is to have her own husband.

The husband must fulfill his duty to his wife, and likewise the wife also to her husband.

The wife does not have authority over her own body, but the husband does; and likewise the husband also does not have authority over his own body, but the wife does.

Stop depriving one another, except by agreement for a time so that you may devote yourselves to prayer, and come together again so that Satan will not tempt you because of your lack of self-control.

But this I say by way of concession, not of command.