Charles Ellicott Commentary Acts 10:45

"And they of the circumcision that believed were amazed, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Spirit." — Acts 10:45 (ASV)

And they of the circumcision which believed . . .—St. Luke obviously dwells on this as a testimony, beyond suspicion, to the reality of the gift. Those who came with Peter were apparently not sharers at the time in the exultant joy which they were still compelled to recognize as the Spirit’s work. They listened with amazement as they heard the rapturous chant burst from the lips of the still unbaptized Gentiles.

Here, accordingly, was one definite fulfillment of Peter’s vision. Those who spoke in this way had been, as it were, carried up into heaven, just as the four-footed beasts and creeping things had been, and so a proof was given that no one might from now on call them common or unclean. Peter himself had indeed learned that lesson so fully (Acts 10:28) that he did not need this special attestation; but for those who came with him, this evidence was needed and was sufficient.