Pesachim 24B

צירעה ⁠— לוקה שש! אמר ליה: כל היכא דאיכא למדרש ⁠— דרשינן, ולא מוקמינן בלאוי יתירי.

If one ate a hornet, he is flogged with 6 sets of lashes. Since a hornet creeps along the ground, all of the previously mentioned prohibitions with regard to an ant apply to it as well. An additional prohibition is stated in the following verse: “And all flying insects are impure to you; they should not be eaten” (Deuteronomy 14:19). Based on this precedent, it is possible to say that the addition of the phrase “It should not be eaten” with regard to impure meat indicates merely an additional negative mitzva for which one would be punished; however, it does not necessarily indicate a prohibition to derive benefit. Rav Ashi said to him: Anywhere that it is possible to expound a new halakha, we expound, and we do not establish the verse as containing additional negative mitzvot with regard to that same prohibition.

״והבשר אשר יגע בכל טמא לא יאכל״ דרישיה למה לי? לרבות עצים ולבונה. ״והבשר כל טהור יאכל בשר״ דסיפיה למה לי? לרבות אימורין.

The Talmud asks: Why do I need the beginning of the verse: “And the flesh that touches any impure thing should not be eaten” (Leviticus 7:19)? The Talmud explains: This comes to include wood and incense; although they are not eaten, they are susceptible to ritual impurity of foods. The Talmud asks: Why do I need the end of this verse: “And as for the flesh, every one that is pure may eat of it” (Leviticus 7:19)? The Talmud answers: This comes to include the sacrificial parts of the animal offered on the altar, such as the fats; they, too, have the legal status of meat and are susceptible to ritual impurity of foods. If these portions become ritually impure and one eats them, even if he is pure, he is liable to be flogged.