Numbers 8:8

Then let them take a young bullock ,.... Of two years old, as the Jewish writers gather from the other in the next clause, being called the second; though the wise men say one of three years old is fit for such a sacrifice; nay, others say, if four or five years old; but the decision is according to the wise men F17 Misn. Parah, c. 1. sect. 2. & Bartenora in ib. .

with his meat offering, even fine flour mingled with oil : which always went along with a burnt offering, and consisted of three tenth deals of line flour, and half an hin of oil, Numbers 28:12 ,

and another young bullock shalt thou take for a sin offering ; which was the offering for the sin of the whole congregation of Israel, through ignorance; and this being for all the Levites, and they being instead of the firstborn of Israel, such an offering was required; and though there was no particular sin charged upon them, but it became necessary for their perfect cleansing and expiation.