1 Corinthians 3:3-4

3You still do what your human nature wants to do. You are jealous of each other, and you quarrel with each other. Yes! This shows that you do what your human nature wants to do. You live like people who do not know God.

4Some of you say, ‘Paul is my leader.’ And other people say, ‘Apollos is my leader.’ When you speak like that, you are talking like people who belong to this world.