1 Corinthians 1:23

but we preach Christ crucified, to the Jews a stumbling block and to the Greeks foolishness,

Surrounding context

1:22 For Jews request a sign, and Greeks seek after wisdom;

1:23 but we preach Christ crucified, to the Jews a stumbling block and to the Greeks foolishness,

1:24 but to those who are called, both Jews and Greeks, Christ the power of God and the wisdom of God.