Kohanim serve Gd, not people

Hi,

"Abba bar bar Chana and Rav Huna were sitting and eating, and R' Zeira was standing and serving them. R' Zeira ascended and brought both wine and oil in one hand. Abba bar bar Chana asked him, 'What is your other hand holding [that you use one hand for both]?'

"Abba bar bar Chana's father grew angry at his son, and said, 'It isn't enough for you that you are reclining while he stands and serves? Further, he is a kohen, and Shemuel taught, 'One who uses a kohen is guilty of trespass!' And yet, you mock him?! I decree that he should recline and you should stand and serve in his place.'"

(Talmud Yerushalmi, Berachot 8:4)

Have a great day,
Mordechai