על מובאה אחת מן הירושלמי בפירוש רש"י לתלמוד

In his commentary on Shabbat 92a, Rashi cites a brief extract from Yerushalmi Shabbat 10:3, whose text differs substantially from that of our Yerushalmi. It is argued here that the differences between Rashi's reading in the Yerushalmi and ours stem from (intentional?) alteration of our Yerushalmi text, which presents considerable contextual difficulties. In fact, though, the lectio difficilior of our Yerushalmi text is evidently the correct reading. This Yerushalmi passage is not a collection of (inappropriate) prooftexts for the rulings in the Mishnah, as assumed by virtually all commentators, but a midrash on Numbers 4:16. It was apparently adduced here as an 'aggadic appendix' to the main sugya, due to various elements which this midrash has in common with the Mishnah.