It may perplex some how, if the Lord, according to the relation of John, asked Philip whence bread was to be found for them, that can be true which Matthew here relates, that the disciples first prayed the Lord to send the multitudes away, that they might buy food from the nearest towns. Suppose then that after these words the Lord looked upon the multitude and said what John relates, but Matthew and the others have omitted. And by such cases as this none ought to be perplexed, when one of the Evangelists relates what the rest have omitted.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: De Cons. Ev., ii, 46