1 Corinthians 7:1-5. Teaches about marriage and marital duties (vs 3-5) within marriage.
1 Corinthians 7:1-5
[1]Now, to deal with the matters you wrote about.A man does well not to marry.
[2]But because there is so much immorality, every man should have his own wife, and every woman should have her own husband.
[3]A man should fulfil his duty as a husband, and a woman should fulfil her duty as a wife, and each should satisfy the other’s needs.
[4]A wife is not the master of her own body, but her husband is; in the same way a husband is not the master of his own body, but his wife is.
[5]Do not deny yourselves to each other, unless you first agree to do so for a while in order to spend your time in prayer; but then resume normal marital relations. In this way you will be kept from giving in to Satan’s temptation because of your lack of self-control.