Rosh HaShanah 16b-17a:
"It has been taught that the school of Shammai says: "There will be three
groups on Judgment Day (yom haDin):
(1) one that is completely righteous,
(2) one that is completely wicked,
(3) and one that is in between."
Okay, I've found the others but I'm lost on this ... I thought 16b-17a were folio numbers which I don't find in the text. I don't know whether this is from the Jerusalem or Babylonian Talmud.