Telling a Sadducee, "Our complete Torah is not to be compared with your empty babble!": Menachot 65b
Tricking the Sons of Beteirah into setting up the blowing of the Shofar in Courts on Shabbat, after the Temple Era: Rosh HaShanah 29b
Rabbi Eliezer as a "friend" or student of Rabbi Yochanan ben Zakkai: Rosh HaShanah 31b; Succah 28a
Rabbi Yochanan ben Zakkai only told the students to leave the Study Hall on the eve of Pesach and the eve of Yom Kippur, and Rabbi Eli'ezer [his student] followed this custom as well: Succah 28a
The strategy of Abba Sikra, head of the Biryonim, and his uncle Rabban Yochanan ben Zakkai, to smuggle out the latter to the Roman general Vespasian during the Roman siege of Jerusalem: Gittin 56a-b
Rabbi Eliezer and Rabbi Yehoshua, students of Rabbi Yochanan ben Zakkai, carrying him out of Jerusalem to the Roman general Vespasian: Gittin 56a
Rabbi Yochanan ben Zakkai's dialogue with the Roman general/emperor Vespasian: Gittin 56a-b