Tzav, Chapter 10
1) (Vayikra 7:9) ("And every meal-offering that is baked in the oven, and all that is made in the stewing-pan and on the griddle, to the Cohein who offers it up, to him shall it be. (Vayikra 7:10) And every meal-offering mixed with oil or dry, to all the sons of Aaron shall it be, one man as well as another.") R. Yossi b. R. Yehudah said: Whence is it derived that if one said: "I vow (to bring) a burnt-offering of meal baked in an oven" that he should not bring half-cakes (challoth) and half-wafers (rekikim)? From "every meal-offering that is baked in the oven, and all that is made in the stewing-pan and on the griddle … and every meal-offering mixed with oil or dry." Just as the latter ("stewing-pan and griddle" and "mixed with oil or dry") are (respectively) two kinds, so, these ("cakes and wafers" — viz. Vayikra 2:4 ("baked in an oven…) cakes and wafers") are two kinds (and cannot combine with each other to constitute a vow connoting a single kind). "and all that is made in the marchesheth (stewing-pan) and the machavath (griddle)." These terms connote the vessels (themselves) and not their products. Just as a tanur ("oven") is a vessel, so marchesheth and machavath are vessels.