1 Corinthians 1:18, 23
1 Corinthians 1:18 NASB1995
For the word of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.
1 Corinthians 1:23 NASB1995
but we preach Christ crucified, to Jews a stumbling block and to Gentiles foolishness