1 Thessalonians 4:1-3

Finally, believers, we ask and admonish you in the Lord Jesus, that you follow the instruction that you received from us about how you ought to walk and please God (just as you are actually doing) and that you excel even more and more [pursuing a life of purpose and living in a way that expresses gratitude to God for your salvation]. For you know what commandments and precepts we gave you by the authority of the Lord Jesus. For this is the will of God, that you be sanctified [separated and set apart from sin]: that you abstain and back away from sexual immorality