Acts 11:2
So when Peter returned to Jerusalem, the champions of circumcision began to bring charges against him
Acts 10:45
Then the Jewish believers who had gone along with Peter were astounded because the gift of the Holy Spirit had been showered upon the heathen too,
Acts 10:9
The next day, while those men were traveling on and not far from the town, Peter went up on the housetop about noon to pray.
Acts 15:1
Some people came down from Judea and began to teach the brothers, "Unless you are circumcised in accordance with the custom that Moses handed down, you cannot be saved."
Acts 15:5
But some members of the Pharisaic party, who had become believers, arose and said that such converts must be circumcised and told to keep the law of Moses.
Acts 21:20-23
They gave the glory to God, when they heard it, and said to him, "You see, brother, how many thousand believers there are among the Jews, all of them zealous champions of the law.
Galatians 2:12-14
For before the coming of certain people from James, he was in the habit of eating with heathen Christians, but after they came, he began to draw back and hold aloof from them, because he was afraid of the circumcision party.