דברים, פרק י״ד, פסוק י״ט

The dietary laws establish clear boundaries regarding the consumption of insects, specifically forbidding small flying creatures. These animals are defined as small, winged insects that swarm and crawl close to the ground while also possessing the ability to fly [רש״י, ביאור שטיינזלץ]. In terms of their physical structure, they have four legs but lack the specialized jointed legs that would allow them to leap [ביאור יש״ר]. Practical examples of these forbidden creatures include flies, wasps, and impure species of grasshoppers [רש״י, ברכת אשר על התורה].

A deeper understanding of these dietary restrictions emerges when comparing the instructions in the book of Deuteronomy with the parallel laws found in the book of Leviticus. One notable distinction lies in the terminology used to disqualify these insects. While Leviticus refers to them as an abomination, Deuteronomy categorizes them as impure [מנחת שי].

A more significant difference relates to the actual prohibition of eating them. The book of Leviticus lists impure grasshoppers but does not issue a direct negative commandment forbidding their consumption. The instructions in Deuteronomy serve to complete this legal picture, filling the gap by explicitly warning against eating them through a formal negative commandment [אדרת אליהו].