Parshas Naso - the prohibition for one Levi to do work assigned to another Levi
The passuk says in this week’s sedrah (4:23) מִבֶּן שְׁלֹשִׁים שָׁנָה וָמַעְלָה עַד בֶּן חֲמִשִּׁים שָׁנָה תִּפְקֹד אוֹתָם כָּל הַבָּא לִצְבֹא צָבָא לַעֲבֹד עֲבֹדָה בְּאֹהֶל מוֹעֵד From 30 years old and upwards until the age of 50 you should count them, all who are subject to work in the performance of tasks required for the ohel mo’ed . The Medrash Rabbah comments on this passuk כל הבא לצבא צבא, שהיו שוערים. לעבוד עבודה באהל מועד, שהיו משוררים. “All who are subject to work,” this refers to the Levi’im who opened and closed the gates of the בית המקדש . “In the performance of tasks,” this refers to the Levi’im who would sing when the korbanos were brought. In other words, different Levi’im were assigned to different specific tasks in the בית המקדש . The gemara in Eruchin (11b) explains that because the Levi’im were assigned to specific tasks, it was אסור for one Levi to perform the work of a different Levi. The gemara brings a machlokess if one Levi who perfo...