1 Corinthians 1:22-24

1:22 For Jews demand miraculous signs and Greeks ask for wisdom, 1:23 but we preach about a crucified Christ, a stumbling block to Jews and foolishness to Gentiles. 1:24 But to those who are called, both Jews and Greeks, Christ is the power of God and the wisdom of God.

1 Corinthians 10:32

10:32 Do not give offense to Jews or Greeks or to the church of God,

1 Corinthians 16:4

16:4 And if it seems advisable that I should go also, they will go with me.