The Oral Talmud with Benay Lappe and Dan Libenson Episode 113

The Sages taught: One suspends the study of Torah to attend the removal of a corpse for burial and to attend the entry of a bride into the wedding canopy. The Sages said about Rabbi Yehuda, son of Rabbi Elai, that he would suspend the study of Torah for the removal of a corpse and for the entry of a bride. About what case was this statement said? Where not enough people are with him (the corpse) for all his needs. However, if there are enough people with him for all his needs, one does not suspend Torah study. And how many people constitute "all his needs"? Rav Shmuel bar Eni said in the name of Rav: Twelve thousand men and six thousand shofar-sounders. And some say: Thirteen thousand men and, among them, six thousand shofar-sounders. Ulla said: Enough so that the men in the funeral procession form a partition stretching from the gate of the city until the cemetery. Rav Sheshet--and some say Rabbi Yoḥanan--said: The number for the taking of the Torah is equivalent to the number for the giving of the Torah. Just as its giving took place with six hundred thousand, so too, its taking should be with six hundred thousand. This applies only to one who read (Torah) and learned (Mishnah).

However, for one who taught ("caused others to learn"), there is no measure for it.