Theophylact of Ohrid
Catena Aurea · Johannesevangelium 4
In the mean while his disciples prayed him, saying, Master, eat. But he said unto them, I have meat to eat that ye know not of. Therefore said the disciples one to another, Hath any man brought him ought to eat? Jesus saith unto them, My meat is to do the will of him that sent me, and to finish his work.
That ye know not of, i. e. know not that I call the salvation of men food; or, know not that the Samaritans are about to believe and be saved. The disciples however were in perplexity: Therefore said the disciples one to another, Hath any man brought Him ought to eat?