What does Leviticus 8:27 mean?

Moses took the fat, the right thigh, and all the bread from the basket of unleavened bread that was in front of the Lord. He put all of it in Aaron’s hands and in his sons’ hands. Leviticus 8:27 - Modern Text Bible

(Moses is following the instructions for the ordination ceremony, giving Aaron and his sons the parts of the offering that symbolize their new role as priests.)