John 6:30

Because, then, He invited them to faith, they still on their part desired to see signs that they might believe. They did not count Him worthy of belief, to whom they themselves bore the witness that He had fed so many thousands with five loaves. Already they had forgotten: they sought meat that perisheth. They said therefore to Him, "What sign showest Thou, that we may see and believe Thee? What dost Thou work? Our fathers did eat manna in the desert, as it is written, He gave them bread from heaven to eat." What is it that I promise? I promise the bread from heaven.

(xxv. 12) To eat then that meat which endureth unto everlasting life, is to believe on Him. Why dost thou make ready thy tooth and thy belly? Only believe, and thou hast eaten already. As He called on them to believe, they still asked for miracles whereby to believe; They said therefore unto Him, What sign shewest Thou then, that we may see and believe Thee? What dost Thou work? (Tr. xxv. s. 12) Or thus; Our Lord sets Himself above Moses, who did not dare to say that He gave the meat which perisheth not. The multitude therefore remembering what Moses had done, and wishing for some greater miracle, say, as it were, Thou promisest the meat which perisheth not, and doest not works equal to those Moses did. He gave us not barley loaves, but manna from heaven.

Mark too their hypocrisy. They said not, "Moses did this sign, what doest thou?" thinking it would annoy Him; but for a while they address Him with great reverence, through expectation of food. So they neither said, "God did this, what doest thou?" that they might not seem to make Him equal with God; nor did they bring forward Moses, that they might not seem to lower Him, but put the matter in an intermediate form, "Our fathers did eat manna in the wilderness." He indeed might have replied, "I, but now, have wrought greater wonders than did Moses, requiring no rod, having no need of prayer, but doing all of Myself; and, if ye call to remembrance the manna, see, I have given you bread." But this was not the season for such speeches; and the one thing He earnestly desired was, to bring them to spiritual food.

What then did they? As though they had heard nothing, they said, "What shall we do, that we might work the works of God?" This they said, not that they might learn and do them, (as the sequel shows,) but to induce Him again to supply them with food, and desiring to persuade Him to satisfy them. What then saith Christ? "This is the work of God, that ye believe on Him whom He hath sent." On this they asked, "What sign showest thou, that we may see and believe?" Nothing more senseless, nothing more unreasonable, than these men! While the miracle was yet in their hands, as though none had been done, they spake after this manner, "What sign shewest thou?" and having thus spoken, they do not even allow Him the right of choosing the sign, but think to force Him to exhibit none other than such a one as was wrought in the days of their fathers; wherefore they say, "Our fathers did eat manna in the wilderness," thinking by this to provoke Him to work such a miracle as might supply them with carnal nourishment. Else why did they mention none other of the miracles of old, though many took place in those times, both in Egypt and at the sea and in the wilderness, but only that of the manna? Was it not because they greatly desired that one by reason of the tyranny of their bellies? Ye who when ye saw His miracle called him a Prophet, and attempted to make Him a king, how is that now, as though none had been wrought, ye have become thankless and ill-minded, and ask for a sign, uttering words fit for parasites, or hungry dogs? Does the manna now seem wonderful to you? Your soul is not now parched up. Mark too their hypocrisy. They said not, "Moses did this sign, what doest thou?" thinking it would annoy Him; but for a while they address Him with great reverence, through expectation of food. […]

Nothing more senseless, nothing more unreasonable, than these men! While the miracle was yet in their hands, as though none had been done, they spake after this manner, "What sign shewest thou?" and having thus spoken, they do not even allow Him the right of choosing the sign, but think to force Him to exhibit none other than such a one as was wrought in the days of their fathers; wherefore they say, "Our fathers did eat manna in the wilderness," thinking by this to provoke Him to work such a miracle as might supply them with carnal nourishment. Else why did they mention none other of the miracles of old, though many took place in those times, both in Egypt and at the sea and in the wilderness, but only that of the manna? Was it not because they greatly desired that one by reason of the tyranny of their bellies?