Luke
Acts 2:12BSB·traditional attribution

Astounded and perplexed, they asked one another, “What does this mean?”

John Calvin Reformed @genevareformer

12. Others mocking Hereby it appeareth how monstrous as well the sluggishness, as also the ungodliness of men is, when Satan hath taken away their mind. If God should openly (and visibly) descend from heaven, his majesty could scarce more manifestly appear than in this miracle. Whosoever hath any drop of sound understanding in him must needs be stricken with the only hearing of it.

Matthew Henry Presbyterian @wholebiblehenry

We have here an account of the public notice that was taken of this extraordinary gift with which the disciples were all on a sudden endued. Observe, I. The great concourse of people that there was now at Jerusalem, it should seem more than was usual at the feast of pentecost.

Commenting on Acts 2:5-13

John Gill Reformed Baptist @doctorgill

And they were all amazed,.... That is, all these devout men, Jews and proselytes, which came from other nations before mentioned: and were in doubt; not whether the apostles spoke in various languages, nor about the sense of their words; for they not only heard them with their ears, and were assured of the facts, but they seem also to understand what was said, since...