Zevachim 14:3-4

Zevachim 14:3

A sacrifice before its time refers to one that is too soon because of itself (i.e., it is not yet the proper age) or because of its owner (i.e., it is too soon to bring his sacrifice). Before its time because of the owner applies to a zav, a zavah, a woman who has given birth and a metzora: if they offer their sin offerings and guilt offerings outside prematurely, they are not liable, but if they offer their burnt offerings or peace offerings outside prematurely, they are liable. If one offers the flesh of a sin offering, of a guilt offering, of kodshei kodashim, of kodshim kalim, or the remainder of the omer, the two Shavuos loaves, the show bread, the remainder of flour offerings, or if one pours oil, mixes a flour offering, breaks a flour offering, salts the handful, waves a flour offering, brings it to the altar, puts the show bread on the Table, trims the lamps of the Menorah, takes the handful of a flour offering or collects a sacrifice’s blood outside, he is not liable (none of these representing the conclusion of a sacrificial service). Similarly, a non-kohein is not liable for performing these duties, nor is a kohein liable for performing them in a state of ritual uncleanliness, “out of uniform,” or without washing his hands and feet.

Zevachim 14:4

Before the Mishkan (Tabernacle) was built, private altars (bamos) were permitted and the service was performed by first-born sons. Once the Mishkan was built, private altars were prohibited and the service was performed by kohanim. Kodshei kodashim (sacrifices of greater sanctity) were eaten within the enclosure of the courtyard, while kodshim kalim (sacrifices of lesser sanctity) were eaten throughout the Israelite camp.