1 Corinthians 2:1

2:1 When I came to you, brothers and sisters, I did not come with superior eloquence or wisdom as I proclaimed the testimony of God.

1 Corinthians 2:4

2:4 My conversation and my preaching were not with persuasive words of wisdom, but with a demonstration of the Spirit and of power,

1 Corinthians 2:13

2:13 And we speak about these things, not with words taught us by human wisdom, but with those taught by the Spirit, explaining spiritual things to spiritual people.