Leviticus 22:3-4

22:3 Say to them, ‘Throughout your generations, if any man from all your descendants approaches the holy offerings which the Israelites consecrate to the Lord while he is impure, that person must be cut off from before me. I am the Lord. 22:4 No man from the descendants of Aaron who is diseased or has a discharge may eat the holy offerings until he becomes clean. The one who touches anything made unclean by contact with a dead person, or a man who has a seminal emission,

Leviticus 22:18

22:18 “Speak to Aaron, his sons, and all the Israelites and tell them, ‘When any man from the house of Israel or from the foreigners in Israel presents his offering for any of the votive or freewill offerings which they present to the Lord as a burnt offering,

Leviticus 23:18

23:18 Along with the loaves of bread, you must also present seven flawless yearling lambs, one young bull, and two rams. They are to be a burnt offering to the Lord along with their grain offering and drink offerings, a gift of a soothing aroma to the Lord.