Probably He had some reason in his mind for this speech. He would know of Elijah’s miracle, by which a hundred men were fed with twenty loaves. This was a great step; but here he stopped. He did not rise any higher. For his next words are, But what are these among so many? He thought that less could produce less in a miracle, and more more; a great mistake; inasmuch as it was as easy for Christ to feed the multitude from a few fishes as from many. He did not really want any material to work from, but only made use of created things for this purpose in order to shew that no part of the creation was severed from His wisdom.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. xlii. 2.