Midrash su Levitico 23:20

8) (Vayikra 23:20) ("And the Cohein shall lift them on the bread of the first fruits, a lifting before the L–rd, on the two lambs. Holy shall they be to the L–rd, to the Cohein.") "And the Cohein shall lift them on the bread of the first fruits": I might think that the bread is to be beneath them; it is, therefore, written "on the two lambs." If "on the two lambs," I might think that the bread is to be on top of the lambs; it is, therefore, written "on the bread of the first fruits." The matter, then, must be weighed. What do we find elsewhere? (Vayikra 8:26) That the bread is on top. Here, too, the bread is on top. R. Yossi b. Mushulam says: The lambs are (placed) on top of the bread. And how am I to understand "on the two lambs"? To exclude the seven (mentioned above from "lifting." Chanina b. Achinas says: He places the two breads between the thighs of the lambs and lifts, thereby satisfying both of these verses — the bread on the lambs and the lambs on the bread. Rebbi said: We would not do so before a king of flesh and blood. Should we do so before the Holy One Blessed be He? Rather, he places one beside the other and lifts, (the word "on" in Hebrew being susceptible to the signification "with.")

9) "Holy shall they be to the L–rd to the L–rd to the Cohein": Bread (is to be offered) even if there are no lambs. These are the words of R. Akiva. R. Shimon b. Naness says: No, lambs (are to be offered) even if there is no bread. Rebbi said: It can go both ways. Who will decide? Ben Naness: I will decide. For we find that for forty years in the desert they sacrificed lambs without bread. Here, too, without bread.

10) R. Shimon said: The halachah is according to Ben Naness, but not the rationale. For everything mentioned in Bamidbar was offered in the desert, and what is mentioned in Vayikra was not offered in the desert. And when they come to Eretz Yisrael, both were offered, as it is written (Vayikra 22:10) "When you come to the land … then you shall bring." Why do I say that lambs are to be offered (even) without bread? Because the lambs "permit" themselves (with the sprinkling of their blood and the offering of their devoted portions). And there is no bread without lambs, for there is no one to permit them, (it being forbidden to eat the bread until the lambs are offered up).