Bava Kama, fol. 60, col. 2.

Rabbi Oshaia asked, “What is this that is written, (Zech. xi. 7), ’I took unto me two staves; the one I called Amiable and the other Destroyer’?” The staff called Amiable represents the disciples of the wise in the land of Israel, who were friendly one toward another in their debates about the law.  The staff called Destroyer represents the disciples of the wise of Babylon, who in the like debates were fierce tempered and not friendly toward one another.  What is the meaning of Babel or Babylon?  Rabbi Yochanan says it means “confused in the Bible, confused in the Mishna, and confused in the Talmud.”  “He hath set me in dark places, as they that be dead of old” (Lam. iii. 6).  Rabbi Jeremiah said by this we are to understand the Babylonian Talmud.

Sanhedrin, fol. 24, col. 1.

    The Rabbis say these three hate their fellows—­dogs, cocks, and
    conjurors; to which some add, among others, the disciples of the
    wise of Babylon. (P’sachim, fol. 113, col. 2.)

On his return from Babylon to the land of Israel, Rabbi Zira fasted a hundred fasts, during which he prayed that he might be enabled to forget the Babylonian Talmud. (Bava Metzia, fol. 85, col. 1.)

Rabbi Yochanan and Rabbi Yonathan traveled one day together; they came to two roads, one of which led by the door of a place devoted to the worship of idols, and the other by a place of ill fame.  Upon which one said to the other, “Let us go by the former, because our inclination to the evil that waylays us there is already extinguished.”  “Nay, rather,” said the other, “let us go by the latter, and curb our desires; so shall we receive a reward in recompense.”  In this resolution they went on, and as they passed the place the women humbled themselves before them and withdrew ashamed into their chambers.  Then Yochanan asked the other, “How didst thou know that this would occur to us?” He made answer, “From what is written (in Prov. ii. 2), ’Discretion (in the law) shall preserve thee.’”

Avodah Zarah, fol. 17, cols. 1, 2.

Given two dry firebrands and one piece of green wood, the dry will set fire to the green.

Sanhedrin, fol 93, col. 1.

With two dogs they caught the lion.

Ibid., fol. 95, col. 1.

    Both these proverbs express the same idea, that a minority, be
    it ever so strong, must give way to a majority.

“And the elders of Moab and the elders of Midian departed together” (Numb. xxii. 7).  Midian and Moab were never friendly toward each other; they were like two dogs tending a flock, always at variance.  When the wolf came upon the one, however, the other thought, “If I do not help my neighbor to-day, the wolf may come upon myself to-morrow;” therefore the two dogs leagued together and, killed the wolf.  Hence, says Rabbi Pappa, the popular saying, “The mouse and the cat are combined to make a feast on the fat of the unfortunate.”