1 Corinthians 11:18
For first of all, I have been informed [Note: This was probably by Chloe's family. See 1:11] that divisions exist among you people when you assemble as a congregation. And I am inclined to believe it [is true].
1 Corinthians 3:3
for you are still worldly [minded]. And since there is jealousy and quarreling among you, is that not evidence that you are [still] worldly and living like [unspiritual] people?
1 Corinthians 1:10-12
Now I urge you, brothers, through the name [i.e., by the authority] of our Lord Jesus Christ, that you should all agree in what you say, so that no divisions [continue] among you. Be restored [to unity] by having common thoughts and convictions [i.e., in spiritual matters].
1 Corinthians 5:1
It has actually been reported [to me] that there is a case of sexual immorality among you that is unheard of, even among the [unconverted] Gentiles. One of you is having sex with his stepmother.
1 Corinthians 6:1
If any one of you has a complaint against someone, how can you dare to take it before non-Christian judges [to be decided], instead of before the saints [i.e., God's holy people]?