1 Corinthians 1:17, 21
1 Corinthians 1:17 ESV
For Christ did not send me to baptize but to preach the gospel, and not with words of eloquent wisdom, lest the cross of Christ be emptied of its power.
1 Corinthians 1:21 ESV
For since, in the wisdom of God, the world did not know God through wisdom, it pleased God through the folly of what we preach to save those who believe.