1 Corinthians 7:3-5 (ESV)

³ The husband should give to his wife her conjugal rights, and likewise the wife to her husband. ⁴ For the wife does not have authority over her own body, but the husband does. Likewise the husband does not have authority over his own body, but the wife does. ⁵ Do not deprive one another, except perhaps by agreement for a limited time, that you may devote yourselves to prayer; but then come together again, so that Satan may not tempt you because of your lack of self-control.