Rabbi Yehoshua ben Levi said, "In twenty-four cases doth the tribunal
excommunicate for the honor of a Rabbi, and all are explained in our
Mishna." Rabbi Elazer interposed and asked, "Where are they?" The reply
was, "Go and seek, and thou shalt find." He went accordingly and sought,
but found only three--the case of the man who lightly esteems the
washing of hands; of him who whispers evil behind the bier of a disciple
of the wise; and of him who behaves haughtily toward the Most High.
THE TALMUD, _Berachoth_, fol. 19, col. 1.