Midrash su Salmi 78:24

R. Levi declared: This situation may be compared to a child that is being carried on his father’s shoulders. When he sees something that excites him he calls out: “Father, take me there.” The father carries him to that place, and then to another and finally to a third place, yet the child, on seeing another man approaching them, asks: “Have you seen my father?” His father calls out: “You have been riding on my shoulders, and wherever you wished to go I carried you, yet now you ask ‘Have you seen my father?’” He then put him down. Whereupon a dog rushed at the child and bit him. Similarly, when the Israelites left Egypt, He surrounded them with clouds of glory, and when they wanted bread, He sent them manna, as it is said: And He caused manna to rain upon them for food, and He gave them of the corn of heaven (Ps. 78:24). And when they wanted meat, He gave them quail, as it is stated: They asked and He brought quails (ibid. 105:40). That is why it says: He gave them that which they craved (ibid. 78:29). And though He gave them whatever they demanded, yet they asked: Is the Lord among us or not? The Holy One, blessed be He, said to them: This is what you have been thinking. Therefore, this dog will bite you. Hence, And Amalek came.