1 Corinthians 2:4-5

2:4 And my speech and my preaching [was] not with enticing words of man’s wisdom, but in demonstration of the Spirit and of power: 2:5 That your faith should not stand in the wisdom of men, but in the power of God.

1 Corinthians 2:13

2:13 Which things also we speak, not in the words which man’s wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.