“And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost.”
King James Version (KJV)
10:45 The believers of the circumcision - The believing Jews.
Ac 10:45 They of the circumcision. The Jews who went with Peter. They were astonished that the Holy Spirit should fall on Gentiles. This miraculous outpouring was extraordinary, and the object is plain, viz: to convince Peter and his fellow Jews that God had accepted the Gentiles; the same reason for which Peter's vision had been given. This is the only instance recorded of the Spirit falling on unbaptized persons. This exception is made to convince the Jewish Christians that uncircumcised Gentiles were fit subjects of baptism. Peter had to recall this fact in order to convince the church at Jerusalem that he had done right (Ac 11:2,3,15). As on Pentecost the Holy Spirit fell on Jews, so now when Gentiles receive the Gospel they are baptized with the Holy Spirit (Ac 11:15,16).