Luke
Acts 10:17ESV·traditional attribution

Now while Peter was inwardly perplexed as to what the vision that he had seen might mean, behold, the men who were sent by Cornelius, having made inquiry for Simon’s house, stood at the gate

John Calvin Reformed @genevareformer

17. Peter was taught not only by the vision, but also by the Word of God; and yet in seeing he saw not, until the Spirit is unto him an interpreter; a most excellent mirror of our slackness. Although we be yet far unlike to Peter; for we are so far from understanding by and by what God will, or to what end he speaketh...

Matthew Henry Presbyterian @wholebiblehenry

Cornelius had received positive orders from heaven to send for Peter, whom otherwise he had not heard of, or at least not heeded; but here is another difficulty that lies in the way of bringing them together - the question is whether Peter will come to Cornelius when he is sent for; not as if he thought it below him to come at a beck...

Commenting on Acts 10:9-18

John Gill Reformed Baptist @doctorgill

Now while Peter doubted in himself,.... For notwithstanding what he had heard and seen, he had not at once a full knowledge of this matter. Beza's most ancient copy reads, "as he was in himself, he doubted"; that is, when he came to himself, for he was before, as it were, out of himself, and was in a trance, or ecstasy; and now being come...