It comes from 1 Corinthians 1:10–13 (CSB): "Now I urge you, brothers and sisters, in the name of our Lord Jesus Christ, that all of you agree in what you say, that there be no divisions among you, and that you be united with the same understanding and the same conviction.  For it has been reported to me about you, my brothers and sisters, by members of Chloe’s people, that there is rivalry among you.  What I am saying is this: One of you says, “I belong to Paul,” or “I belong to Apollos,” or “I belong to Cephas,” or “I belong to Christ.”  Is Christ divided?"