Leviticus 1:2-3

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. If his oblation be a burnt-offering of the herd, he shall offer it a male without blemish: he shall offer it at the door of the tent of meeting, that he may be accepted before Jehovah.