1 Thessalonians 4:3-8

God wants you to be holy and to stay away from sexual immorality. He wants each one of you to learn how to take a wife in a way that is holy and honorable. Don’t give in to lust like people who do not know God. So do not wrong your brother or cheat him in this way. The Lord will punish people who do those things. We have already told you and warned you about that. God called us to be holy and does not want us to live in sin. So the person who refuses to obey this teaching is refusing to obey God, not man. And God is the One who gives us his Holy Spirit.