From here, R. Yossi and R. Shimon say: Israel "stuffed" themselves like horses at that time, it being written here "to eat," and elsewhere (re the manna) (Psalms 78:25) "Each man ate the bread of abirim." Read it not "abirim," but "eivarim" ("limbs") — bread that is absorbed by the limbs. He said to them: This "man" that you are eating is being absorbed by your limbs.