תלמוד על חגיגה 1:8

Rebbi⁹⁸The entire following discussion on oral tradition is also in Taäniot 1:8. Zeïra said in the name of Rebbi Joḥanan: If you come to notice a practice of which you do not know the reason, do not push it aside as something alien since many practices were shown to Moses on Sinai and all of them were absorbed into the Mishnah. Rebbi Abin said, that is correct! If Naḥum had not come and explained it to us about the two kinds of wheat, could we have known⁹⁹That the rule of two kinds of wheat in one field is a practice revealed to Moses.?