1 Corinthians 2:4-5

2:4 My conversation and my preaching were not with persuasive words of wisdom, but with a demonstration of the Spirit and of power, 2:5 so that your faith would not be based on human wisdom but on the power of God.

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. ¹ 

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¹ tn Or “combining spiritual things with spiritual words” (i.e., words the Spirit gives, as just described).