ובנבלתם לא תגעו. רַבּוֹתֵינוּ פֵּרְשׁוּ — בָּרֶגֶל, שֶׁאָדָם חַיָּב לְטַהֵר אֶת עַצְמוֹ בָּרֶגֶל, יָכוֹל יִהְיוּ מֻזְהָרִים בְּכָל הַשָּׁנָה, תַּ"לֹ "אֱמֹר אֶל הַכֹּהֲנִים וְגוֹ'", וּמַה טֻּמְאַת הַמֵּת חֲמוּרָה, הַכֹּהֲנִים מֻזְהָרִים וְאֵין יִשְׂרָאֵל מֻזְהָרִים, טֻמְאַת נְבֵלָה קַלָּה, לֹא כָּל שֶׁכֵּן: ובנבלתם לא תגעו YE SHALL NOT TOUCH THEIR CARRION — Our Rabbis explained that this refers only to the festive seasons when every male Israelite was obliged to appear in the Sanctuary and should therefore be in a state of cleanness. One might think that they (the Israelites, i.e. non-priests) are prohibited from touching a carcass during the whole year! It, however, states, (Leviticus 21:1) in reference to the uncleanness of a corpse: “Say unto the priests … [there shall none be defiled by the dead] etc.”. Now you may draw a conclusion a fortiori: How is it in the case of uncleanness caused by a corpse which is a stringent kind of uncleanness? Priests only are prohibited regarding it but ordinary Israelites are not prohibited! Surely in the case of uncleanness caused by a carcass which is less stringent this is all the more so! (Sifra, Shemini, Chapter 4 8-9; cf. Rashi on Leviticus 11:8 and Note thereon).