מדרש על ויקרא 2:8

1) (Vayikra 2:8) If it were written (only) "And you shall bring what shall be made of these to the L–rd, and he (the donor) shall present it to the Cohein, and he shall touch it to the altar," I might think that only the fistful alone required "touching." Whence would I derive that the entire meal-offering is intended? It is, therefore, written ("And you shall bring the) meal-offering." And whence is it derived that this includes the meal-offering of a sinner for "touching"? From "the meal-offering."

1) — Now does it not follow (without the inclusion clause [above] that the sotah's meal-offering requires "touching"?), viz.: If the meal-offering of a sinner, which does not require waving, requires "touching" — the meal-offering of a sotah, which requires waving, how much more so should it require "touching"! — No, it may be that this is so with the meal-offering of the sinner, which comes of wheat, and not with the meal-offering of the sotah, which does not come of wheat, (but of barley, an inferior variety). — This is refuted by the meal-offering of the omer, which does not come of wheat, (but of barley), and still requires touching.

1) (Vayikra 2:14): ("Groats of the fresh ear [karmel]) you shall offer (the meal-offering of your bikkurim"): Why repeat this? (It is already mentioned in the beginning of the verse.) Because it is written "karmel," I might think the mitzvah is to bring only rach mal (see Vayikra 2:8) above). Whence do I derive that if he did not find rach mal he may bring it dry? From "you shall offer the meal-offering of your bikkurim" (in any event). It is a mitzvah to bring it from the harvest (i.e., from the standing grain). Whence do I derive that if he did not find this he may bring it from the (sheaves) in the loft? From "you shall offer the meal-offering of your bikkurim" — in any event.