Galatians 2:11-13

When Cephas (Peter) came to Antioch, I opposed him to his face, because he stood condemned. For before certain men came from James, he used to eat with the Gentiles. But when they arrived, he began to draw back and separate himself from the Gentiles because he was afraid of those who belonged to the circumcision group. The other Jews joined him in his hypocrisy, so that by their hypocrisy even Barnabas was led astray. 

When Cephas (Peter) came to Antioch, I opposed him to his face, because he stood condemned 
Acts 11:19  Now those who had been scattered by the persecution that broke out when Stephen was killed traveled as far as Phoenicia, Cyprus and Antioch, spreading the word only among Jews.
Galatians 2:14  When I saw that they were not acting in line with the truth of the gospel, I said to Cephas (Peter) in front of them all, "You are a Jew, yet you live like a Gentile and not like a Jew. How is it, then, that you force Gentiles to follow Jewish customs?"

For before certain men came from James, he used to eat with the Gentiles 
Acts 11:1-3  The apostles and the believers throughout Judea heard that the Gentiles also had received the word of God. So when Peter went up to Jerusalem, the circumcised believers criticized him and said, "You went into the house of uncircumcised men and ate with them." 

he began to draw back and separate himself from the Gentiles because he was afraid of those who belonged to the circumcision group
Acts 10:45  The circumcised believers who had come with Peter were astonished that the gift of the Holy Spirit had been poured out even on Gentiles.

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
Limited to 15 verses per post.