Numbers 29:39

These things ye shall do to the Lord, in your set feasts,.... Or rather in the times set and appointed to you, as the Jewish writers o 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 Leviticus 7:11.

o Maimon. Bartenora in Misn. Pesach, c. 7. sect. 4.