Sforno on Leviticus 7:32/ספורנו על ויקרא ז׳:ל״ב

1ואת שוק הימין תתנו תרומה לכהן, from the part which belongs to the owners; we may view the priest in this instance as similar to the King’s minister who, when someone who comes to offer a gift to the king, accepts a smaller gift meant for the king’s servant in order to secure an audience with the king by the person bearing the larger gift.