camps of the Israelites, and in the time of the Temple in Jerusalem, both actions had to be conducted to the east of Jerusalem. Rabbi Isaac contrasted the Red Cow in and the bull that the High Priest brought for himself on Yom Kippur in Rabbi Isaac taught that a lay Israelite could slaughter one of the two, but not the other, but Rabbi Isaac did not know which was which. The Gemara reported that Rav and Samuel disagreed about the answer. Rav held it invalid for a lay Israelite to slaughter the Red Cow and valid for a lay Israelite to slaughter the High Priest's bull, while Samuel held it invalid for a lay Israelite to slaughter the High Priest's bull and valid for a lay Israelite to slaughter the Red Cow. The Gemara reported that Rav Zeira (or some say Rav Zeira in the name of Rav) said that the slaughtering of the Red Cow by a lay Israelite was invalid, and Rav deduced from this statement the importance that specifies "Eleazar" and specifies that the law of the Red Cow is a "statute" (and thus required precise execution). But the Gemara challenged Rav's conclusion that the use of the terms "Eleazar" and "statute" in in connection with the Red Cow decided the matter, for in connection with the High Priest's bull, specifies "Aaron," and calls the law of a "statute," as well. The Gemara supposed that the characterization of of the law as a "statute" might apply to only the Temple services described in and the slaughtering of the High Priest's bull might be regarded as not a Temple service. But the Gemara asked whether the same logic might apply to the Red Cow, as well, as it was not a Temple service, either. The Gemara posited that one might consider the Red Cow to have been in the nature of an offering for Temple upkeep. Rav Shisha son of Rav Idi taught that the Red Cow was like the inspection of skin diseases in which was not a Temple service, yet required a priest's participation. The Gemara then turned to Samuel's position, that a lay Israelite could kill the Red Cow. Samuel interpreted the words "and he shall slay it before him" in to mean that a lay Israelite could slaughter the cow as Eleazar watched. The Gemara taught that Rav, on the other hand, explained