I Thessalonians 4:6-12

that no one should take advantage of and defraud his brother in this matter, because the Lord is the avenger of all such, as we also forewarned you and testified. For God did not call us to uncleanness, but in holiness. Therefore he who rejects this does not reject man, but God, who has also given us His Holy Spirit. But concerning brotherly love you have no need that I should write to you, for you yourselves are taught by God to love one another; and indeed you do so toward all the brethren who are in all Macedonia. But we urge you, brethren, that you increase more and more; that you also aspire to lead a quiet life, to mind your own business, and to work with your own hands, as we commanded you, that you may walk properly toward those who are outside, and that you may lack nothing.