Acts 11:2

And when Peter came up to Jerusalem, those [believers] of Jewish descent began to argue with him,

Acts 10:45

And the believers of Jewish descent, who had come with Peter, were amazed [when they saw] that the gift of the Holy Spirit had [now] been poured out on the Gentiles also.

Acts 10:9

As they were traveling the next day, and were coming close to the city [of Joppa], Peter went up about noontime [Note: Or

Acts 15:1

Certain men [i.e., believers, see verse 5] came down from Judea [to Antioch of Syria] and began teaching the brothers this: You cannot be saved unless you are circumcised according to the custom [required] by Moses.

Acts 15:5

But certain believers, [who had been] members of the sect called Pharisees [i.e., a strict sect of the Jewish religion], began saying, "It is necessary to circumcise people [see verse 1] and require them to keep [the ordinances of] the law of Moses."

Acts 21:20-23

And when they heard [all] this, they gave honor to God, then said to Paul, "Brother, you can see how many thousands of Jewish believers [in Christ] there are [everywhere] and all of them are eager to observe the [requirements of the] law of Moses.

Galatians 2:12-14

For, before certain [leaders] came from James [i.e., Jesus' brother, a leader of the Jerusalem church, See Acts 12:17; 15:13-22], he had eaten [a social meal] with some Gentiles. But when these men came, he abruptly discontinued this practice out of fear of the circumcised ones [i.e., out of concern for what the Jews would think of him].

Treasury of Scripture Knowledge

Summary

And when Peter was come up to Jerusalem, they that were of the circumcision contended with him,

Bible References

They

Acts 10:9
AM], while he was wide awake, he had a vision in which an angel of God came to him [and spoke his name] "Cornelius."
Acts 15:1
Certain men [i.e., believers, see verse 5] came down from Judea [to Antioch of Syria] and began teaching the brothers this: You cannot be saved unless you are circumcised according to the custom [required] by Moses.
Acts 21:20
And when they heard [all] this, they gave honor to God, then said to Paul, "Brother, you can see how many thousands of Jewish believers [in Christ] there are [everywhere] and all of them are eager to observe the [requirements of the] law of Moses.
Galatians 2:12
For, before certain [leaders] came from James [i.e., Jesus' brother, a leader of the Jerusalem church, See Acts 12:17; 15:13-22], he had eaten [a social meal] with some Gentiles. But when these men came, he abruptly discontinued this practice out of fear of the circumcised ones [i.e., out of concern for what the Jews would think of him].