(Bamidbar 29:36) "And you shall present a burnt-offering": I might think that if he found bullocks but not rams, or rams but not lambs, that he does not sacrifice any until he finds all. It is, therefore, written "And you shall present a burnt-offering, a fire-offering," implying (if he found) even one. I might then think that even if all were found, (he may present only one). It is, therefore, written (Ibid.) "one bullock, one ram, etc."
(Bamidbar 29:39) "These shall you offer to the L-rd on your festivals, aside from, etc.": These are the vows and the gift-offerings that he vows on the festival, that he is to bring them on the festival. You say this, but perhaps Scripture speaks of the vows and the thank-offerings of the whole year? (This is not so, for Devarim 12:5-6) "And you shall come there and you shall bring there … your vows and your gifts" already speaks of the vows and gifts of the whole year. How, then, am I to understand "These shall you offer to the L-rd on your festivals"? As referring to the vows and the gift-offerings that he vows on the festival, that they are to be brought on the festival. "aside from your vows" These are the bird-pairs of the zavim and the zavoth (those with a genital flow), which (bird-pairs) the Torah permitted to be brought on a festival. "aside from your vows … (31) And Moses said to the children of Israel": (The purpose of "And Moses said" is) to conclude the foregoing. For if I read "aside from your vows … (30:2) And Moses spoke," I would not know to what it ("And Moses spoke") referred, (to what precedes or to what follows?) It is, therefore, written "from your vows … And Moses said," to conclude what precedes. These are the words of R. Yishmael.