These weren't just random pieces of meat; they were specific portions symbolizing a covenant relationship.
The 'wave breast' and 'heave shoulder' were specific parts of the peace offering that God designated as the priests' portion. The Hebrew concept behind 'due' signifies a portion or share rightfully belonging to someone.
A Reminder of Service and Blessing
These portions were given 'out of the sacrifices of the peace offerings.' Peace offerings (or fellowship offerings) were voluntary sacrifices that expressed gratitude, sought communion, or made a vow. By giving the breast and shoulder to the priests, God was not only providing for them but also reminding the offerer and the priest of their shared fellowship with Him. The priest's role was crucial in mediating this communion, and these portions were a tangible sign of that sacred trust and the blessing it brought.