1 Thessalonians 4:3, 6
1 Thessalonians 4:3 NIV
It is God’s will that you should be sanctified: that you should avoid sexual immorality
1 Thessalonians 4:6 NIV
and that in this matter no one should wrong or take advantage of a brother or sister. The Lord will punish all those who commit such sins, as we told you and warned you before.