This past Friday's TV episode of Jeopardy (aired 2019/10/04), in the
category "Words About Words", had this clue:
It's a word that tells people you're in a group; in the Bible those
who said "sib" instead of "shib" were slaughtered
http://www.j-archive.com/suggestcorrection.php?clue_id=372689
-Phil