Leviticus 1:2-3

“Speak to the sons of Israel and say to them, ‘When any man of you brings an offering to the LORD, you shall bring your offering of animals from the herd or the flock. If his offering is a burnt offering from the herd, he shall offer it, a male without defect; he shall offer it at the doorway of the tent of meeting, that he may be accepted before the LORD.