In the first epistle of Paul to Thessalonians:
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...
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.
1 Thessalonians 4: 9-12