Trespass offering was the Perquisites of the Priest
Source: TTT
Leviticus 14:13
Then he is to slaughter the lamb in the sanctuary area where the sin offering and burnt offering are slaughtered. Like the sin offering, the guilt offering belongs to the priest; it is most holy.
Ezekiel 44:29
They shall eat the grain offerings, the sin offerings, and the guilt offerings. Everything in Israel devoted to the LORD will belong to them.