Rab Acha bar Avira and Rav Asi in his name [(some say)]. Rabbi Shimon the Pious said [Rosh Hashanah (35a)]. Rabbi Yitzchak said [Niddah (27a)] and Rabbi Ashi said [Berakhot (44a)]. Rava said that when Rav Acha bar Avira sent [some say, and there is some error in his words, see there]:
Seder_HaDorot,_Tanaim_and_Amoraim.308:1