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As we learned regarding animal sacrifices in Massekhet Zevaḥim (see, for example, daf 13b) inappropriate thoughts that take place at key moments during the preparation of a sacrifice will cause that sacrifice to become invalid. Improper thoughts about where the sacrifice might be eaten or sacrificed will cause it to be considered notar – “left over” – which invalidates the sacrifice; improper thoughts about the time that the sacrifice was to be eaten or sacrificed will cause it to be considered piggul – “abhorrent.” Such a sacrifice is invalid; eating such a sacrifice also entails the punishment of karet – excision – a Heavenly death penalty.
The Mishna on our daf teaches that these laws apply to meal offerings, as well. The source for this law is the parallel that exists between the rules of animal sacrifices and meal offerings. According to Rashi this is based on the Torah’s placement of all sacrifices in a single passage in Lev (7:37).
Which are the “key moments” that are the times when the thoughts of notar or piggul will affect the validity of the meal offerings?