פסחים דף נז ע"א
תנו רבנן: ארבע צווחות צוחה עזרה ... ועוד צווחה צא מיכן יששכר איש כפר ברקאי שמכבד את עצמו ומחלל קדשי שמים דהוה כריך ידיה בשיראי ועביד עבודה ... ועוד צווחה העזרה שאו שערים ראשיכם ויכנס יוחנן בן נרבאי תלמידו של פנקאי וימלא כריסו מקדשי שמים אמרו עליו על יוחנן בן נרבאי שהיה אוכל ג' מאות עגלים ושותה ג' מאות גרבי יין ואוכל ארבעים סאה גוזלות בקינוח סעודה אמרו כל ימיו של יוחנן בן נרבאי לא נמצא נותר במקדש...
מאי סלקא ביה ביששכר איש כפר ברקאי אמרי מלכא ומלכתא הוו יתבי מלכא אמר גדיא יאי ומלכתא אמרה אימרא יאי אמרו מאן מוכח כהן גדול דקא מסיק קרבנות כל יומא אתא איהו אחוי בידיה אי גדיא יאי יסק לתמידא אמר מלכא הואיל ולא הוי ליה אימתא דמלכותא ניפסקו לימיניה יהב שוחד ופסקיה לשמאליה שמע מלכא ופסקיה לימיניה
Pesachim 57a-b
Our Rabbis taught: The Bet Hamikdash would cry out about four incidents.... The second cry was over Yissachar the Cohen who used to honor himself and degrade the korbanot by refusing to touch them without his silk gloves on first [so as not to dirty himself], and "that incident" happened to him because of it... The fourth cry was over Yohanan b. Narbai who would eat 300 calves and drink 300 gallons of wine, and finish it off with 40 barrels of doves for dessert. They say that in all his days, there were never any leftovers in the Bet Hamikdash....
What was "that incident" that happened to Yissachar the Cohen? Once, the king and queen got into an argument.
"Goat meat is the best meat!" the king posited.
"What are you insane?" the queen responded, "Sheep is much tastier!"
They called Yissachar the Cohen to settle their debate, considering the fact that his job involved eating sheep and goat meat all day.
"Which meat is better?" they asked him.
Yissachar waved his hand dismissively at the king and said, "If goat meat was really better like you claim, God would have chosen it for the Korban Tamid instead of sheep."
The king got offended by his hand wave, which he understood to be a gesture of disrespect. "Off with his hand!!" he shouted.
They carted Yissachar off to the dungeon to receive his punishment. Yissachar bribed the warden so he would cut off his left hand instead of his right. The king found out, and had them cut off Yissachar's right hand too,
Thus, Yissachar the Cohen was justly punished for refusing to "dirty" his hands with the korbanot. Aharon, on the other hand, was eager to clean out the filthy, sooty residue from the menora each day. Likewise, David HamMelech would gladly handle all sorts of bodily fluids to determine if a woman was tehora or not (Berachot 4a). When it comes to Torah, we must embrace it in its entirety without allowing aspects of it to disgust us or gross us out.
