contemptible; but more contemptible is he who begins to eat before his
guest; more contemptible is that guest who invites another guest; and
still more contemptible is he who begins to eat before a disciple of the
wise; but contemptible before all these three put together is that guest
which troubles another guest.

_Derech Eretz Zuta_, chap. viii.

A roll of the law which has two mistakes to a column should be
corrected; but if there be three, it should be stowed away altogether.

_Menachoth_, fol. 29, col. 2.

The wolf, the lion, the bear, the leopard, the panther, the elephant,
and the sea-cat, each bear three years.

Ibid.

Rav Yehudah says, in the name of Rav, "The butcher is bound to have
three knives; one to slaughter with, one for cutting up the carcass, and
one to cut away the suet. Suet being as unlawful for food as pork."

_Chullin_, fol. 8, col. 2.

Three classes of ministering angels raise a song of praise every day.
One class says, Holy! the second responds, Holy! and the third
continues, Holy is the Lord of hosts! But in the presence of the Holy
One--blessed be He!--Israel is more beloved than the ministering angels;
for Israel reiterates the song every hour, while the ministering angels
repeat it only once a day, some say once a week, others once a month,