פירוש על קידושין 77:6

R. Yohanan rules that the prohibition of orlah outside the Land is a halakhah to Moses at Sinai. This is a status almost akin to the status of prohibited by the Torah. But R. Zera raises a difficulty on this position. Doubtful orlah is permitted outside the Land. This would seem to mean the prohibition of certain orlah is lower than that of a “halakhah of Moses from Sinai.” R. Assi responds by including the distinction between doubtful and certain orlah into the halakhah of Moses from Sinai. In other words, when the halakhah was given to Moses, it reflected the same halakhah found in the baraita.