Romans 1:16 King James Version (KJV)

¹⁶ For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.

1 Corinthians 1:18 King James Version (KJV)

¹⁸ For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.

1 Corinthians 1:23-24 King James Version (KJV)

²³ But we preach Christ crucified, unto the Jews a stumblingblock, and unto the Greeks foolishness;

²⁴ But unto them which are called, both Jews and Greeks, Christ the power of God, and the wisdom of God.