1 Corinthians 1:6

1:6 just as the testimony about Christ has been confirmed among you –

1 Corinthians 2:3

2:3 And I was with you in weakness and in fear and with much trembling.

2:5 so that your faith would not be based on human wisdom but on the power of God.

5:9 I wrote you in my letter not to associate with sexually immoral people.