1 Corinthians 1:22-24; 1 Corinthians 9:20; 1 Corinthians 10:32; 1 Corinthians 12:13 (King James Version)

22 For the Jews require a sign, and the Greeks seek after wisdom: 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. 20 And unto the Jews I became as a Jew, that I might gain the Jews; to them that are under the law, as under the law, that I might gain them that are under the law; 32 Give none offence, neither to the Jews, nor to the Gentiles, nor to the church of God: 13 For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit.