John 6:31 - Matthew Poole's English Annotations on the Holy Bible

Here they magnify Moses; he did not bring them a law only, but confirmed it by signs from heaven to be the will of God, by obtaining for them bread to be mined from heaven to satisfy their hunger, Exodus 16:15 Numbers 11:7; which is also confirmed by the psalmist, Psalms 78:25. This Moses did for the whole congregation of Israel forty years together. From hence they would seem to conclude, that they had more ground to believe Moses than Christ, who, though he had indeed lately fed five thousand with five loaves, yet had done no such thing. Not considering that Moses, in what he did, was but an instrument to obtain of God by prayer such a miracle, for supporting his people in the wilderness; and that what he had done, was done by a creating power inherent in himself, by which he multiplied that little proportion of bread which they had, to make it sufficient to feed such a quantity as five thousand, besides women and children; to which effect it bare no proportion.