רב הלל

Rabbi Hillel, a colleague of Rabbi Ashi, said to Rabbi Ashi: "For me, it is evident that there are secondary matters, as stated by Mar, the son of Rabbanan there" (Yevamot 19a, 21b). Rabbi Ashi responded: "When we were in the presence of Rabbi Kahana, we discussed the following: Shabbat (Kiddushin 109a), Bava Batra (Chullin 98a), and Chullin (Niddah 53a)."