John Chrysostom — as excerpted in the Catena Aurea on John 21:12-14

“(Hom. lxxxvii) He means that they had not confidence to talk to Him, as before, but sat looking at Him in silence and awe, absorbed in regarding His altered and now supernatural form, and unwilling to ask any question. Knowing that it was the Lord, they were in fear, and only ate what, in exercise of His great power, He had created. He again does not look up to heaven, or do any thing after a human sort, thus shewing that His former acts of that kind were done only in condescension: Jesus then cometh, and taketh bread, and giveth them, and fish likewise.”