Charles Ellicott Commentary Leviticus 1:2

"Speak unto the children of Israel, and say unto them, When any man of you offereth an oblation unto Jehovah, ye shall offer your oblation of the cattle, [even] of the herd and of the flock." — Leviticus 1:2 (ASV)

Speak unto the children of Israel. —The directions for the different sacrifices specified in Leviticus 1:2; Leviticus 3:17, are not in the first instance communicated to the priests who should teach them to the people, but are directly addressed to the people themselves.

Ye shall bring your offering ... — Or, from the cattle ye shall bring your offering, from the oxen and from the flock, that is, if the offering is of quadrupeds in contradistinction to the “fowl” mentioned in Leviticus 1:14, they are to be of oxen and small cattle (tzön), i.e., sheep and goats.