Against God; against Christ, their chief Conductor, whom they tempted, 1 Corinthians 10:9. This light bread, i.e. of small substance and virtue. Thus contemptuously do they speak of manna, whereas it appears it yielded excellent nourishment, because in the strength of it they were able to go so many and such tedious journeys.
Related Commentaries of Numbers 21:5
Numbers 21:5
5 And the people spake against God, and against Moses, Wherefore have ye brought us up out of Egypt to die in the wilderness? for there is no bread, neither is there any water; and our soul loatheth this light bread.