Reference for Shabbat 178:9
תבלין כדי לתבל ביצה קלה: ורמינהו תבלין שנים וג' שמות ממין אחד או משלשה מינין (ושם אחד) אסורין ומצטרפין זה עם זה ואמר חזקיה
AS MUCH AS IS REQUIRED FOR WASHING THE SMALL PIECE OF CLOTH AT THE OPENING [TOP] OF A NETWORK; R. JUDAH SAID: AS MUCH AS IS REQUIRED FOR REMOVING THE STAIN.<span class="x" onmousemove="('comment',' Caused by a menstruous woman, v. Sanh. 49b. ');"><sup>22</sup></span> <b><i>GEMARA</i></b>. [But] we have [already] learnt it once: A reed, (the standard is] as much as is required for making a pen. But if it is thick or crushed, as much as is required for boiling the lightest of eggs beaten up and placed in a stew pot?<span class="x" onmousemove="('comment',' And obviously the same applies to wood. ');"><sup>23</sup></span> — You might say, [That is only] there, because it is unfit for anything [else], but since wood is fit for the tooth of a key, for no matter how little involved [culpability is]; hence we are informed [otherwise]. [SEASONING] SPICES, AS MUCH AS IS REQUIRED FOR SEASONING A LIGHT EGG. But the following contradicts this: Spices of two or three designations<span class="x" onmousemove="('comment',' Rashi: e.g., black pepper, white pepper, etc. Tosaf.: spices forbidden under various headings, e.g., 'orlah, kil'ayim, etc. ');"><sup>24</sup></span> belonging to the same species or three [different] species are forbidden,<span class="x" onmousemove="('comment',' If used for seasoning food, the food is interdicted. ');"><sup>25</sup></span> and they combine with each other.<span class="x" onmousemove="('comment',' If there is not sufficient in one to impart a flavour but only in combination with each other. ');"><sup>26</sup></span> And Hezekiah observed;