1 Corinthians 7:2-4

2 But because there is so much sexual immorality, each man should have his own wife, and each woman her own husband.

3 The husband should fulfill his marital duty to his wife, and likewise the wife to her husband.

4 The wife does not have authority over her own body, but the husband. Likewise the husband does not have authority over his own body, but the wife.