Luke
Acts 6:15ESV·traditional attribution

And gazing at him, all who sat in the council saw that his face was like the face of an angel.

John Calvin Reformed @genevareformer

15. And when they had beheld. Men do commonly in places of judgment turn their eyes toward the party arraigned, when as they look for his defense. He saith that Stephen appeared like to an angel; this is not spoken of his natural face, but rather of his present countenance.

Matthew Henry Presbyterian @wholebiblehenry

Stephen, no doubt was diligent and faithful in the discharge of his office as distributor of the church's charity, and laid out himself to put that affair in a good method, which he did to universal satisfaction; and though it appears here that he was a man of uncommon gifts, and fitted for a higher station, yet, being called to that office, he did not...

Commenting on Acts 6:8-15

John Gill Reformed Baptist @doctorgill

And all that sat in the council,.... The whole sanhedrim, looking steadfastly on him; to observe whether his countenance altered, his tongue stammered, or he trembled in any part of his body, neither of which appeared; but on the contrary, they saw his face, as if it had been the face of an angel.