Reference for Shabbat 255:17
רב הונא אמר מותר לטלטלו והא רב הונא תלמיד דרב הוה ורב כר' יהודה סבירא ליה דאית ליה מוקצה
if they were brought in for fuel, one must not draw on them [for food] on the Sabbath; [if brought in] as animal fodder, he may draw on them on the Sabbath; and he may break [it] with his hand and eat [thereof], provided that he does not break it with a utensil. And he may crush it and eat, provided that he does not crush a large quantity with a utensil: the words of R. Judah. But the Sages maintain: He may crush [it] with the tips of his fingers and eat, provided, however, that he does not crush a large quantity with his hands in the [same] way as he does on weekdays; the same applies to ammitha, the same applies to higgam [rue], and the same applies to other kinds of spices. What is ammitha? Ninya.<span class="x" onmousemove="('comment',' Jast.: Bishop's weed. Rashi: mint. ');"><sup>15</sup></span>