Numbers 29:39

“These things ye shall do to the Lord, in your set feasts, etc.] Or rather in the times set and appointed to you, as the Jewish writers f442 interpret it; and so Jarchi interprets it of a fixed time, which seems better; since these were not all feast days, on which the above sacrifices were to be offered, for one of them was a fast, even the day of atonement: besides your vows, and your freewill offerings: which might be offered up at any time, notwithstanding the above sacrifices, which were necessary and obligatory; but these were at their own option: for your burnt offerings, and for your meat offerings, and your drink offerings, and for your peace offerings; of which (see…”

“These things ye shall do unto the Lord in your set feasts--From the statements made in this and the preceding chapter, it appears that the yearly offerings made to the altar at the public expense, without taking into account a vast number of voluntary vow and trespass offerings, were calculated at the following amount:--goats, fifteen; kids, twenty-one; rams, seventy-two; bullocks, one hundred thirty-two; lambs, 1,101; sum-total of animals sacrificed at public cost, 1,241. This, of course, is exclusive of the prodigious addition of lambs slain at the passover, which in later times, according to JOSEPHUS, amounted in a single year to the immense number of 255,600. Next: Numbers Chapter 30”

“29:39 Public offerings were supplemented by a variety of voluntary individual gifts (cp. Lev 23:38).”

“do: or, offer in your set feasts: It appears from the account in these two chapters, that there were annually offered to God, at the public charge, independently of a prodigious number of voluntary, vow, and trespass offerings, 15 goats, 21 kids, 72 rams, 132 bullocks, and 1,101 lambs. But how little is all this compared with the lambs slain every year at the passover. Cestius, the Roman general, asked the priests how many persons had come to Jerusalem at their annual festivals. the priests, numbering the people by the lambs that had been slain, said, "twenty-five myriads, 5,000, and 600." Lev 23:2; Ch1 23:31; Ch2 31:3; Ezr 3:5; Neh 10:33; Isa 1:14 beside your vows: Num 6:21; Lev 7:11,…”

“The sacrifices already mentioned were to be presented to the Lord on the part of the congregation, in addition to the burnt-offerings, meat-offerings, drink-offerings, and peace-offerings which individuals or families might desire to offer either spontaneously or in consequence of vows. On the vowing of burnt-offerings and peace-offerings, see Num 15:3, Num 15:8; Lev 22:18, Lev 22:21. Numbers 29:40”