Luke
Acts 10:4BSB·traditional attribution

Cornelius stared at him in fear and asked, “What is it, Lord?” The angel answered, “Your prayers and gifts to the poor have ascended as a memorial offering before God.

John Calvin Reformed @genevareformer

4. And he beheld, and was afraid. Luke expresseth his attentiveness in plain words, that we may know that it was no vain imagination which came upon the man as he was sleeping or doing some other thing. The fear wherewith he was taken “Terror quo correptus est,” the terror with which he was seized.

Matthew Henry Presbyterian @wholebiblehenry

The bringing of the gospel to the Gentiles, and the bringing of those who had been strangers and foreigners to be fellow-citizens with the saints, and of the household of God, were such a mystery to the apostles themselves, and such a surprise (Eph 3:3, Eph 3:6), that it concerns us carefully to observe all the circumstances of the beginning of this great work, this...

Commenting on Acts 10:1-8

John Gill Reformed Baptist @doctorgill

And when he looked on him, he was afraid,.... What with the brightness of his clothing, Act 10:30 and the lustre of his countenance, and the majestic form in which he appeared, he perceived there was something uncommon and divine in this vision, and therefore was filled with awe and reverence, yea, with something of a panic fear; as it was usual, even with good...