1 Corinthians 1:17-18, 22-23

For Christ sent me not to baptize, but to preach the gospel: not in wisdom of words, lest the cross of Christ should be made void. For the word of the cross is to them that perish foolishness; but unto us who are saved it is the power of God.

Seeing that Jews ask for signs, and Greeks seek after wisdom: but we preach Christ crucified, unto Jews a stumblingblock, and unto Gentiles foolishness