Reference for Sukkah 3:8
אֵין אוֹגְדִין אֶת הַלּוּלָב אֶלָּא בְמִינוֹ, דִּבְרֵי רַבִּי יְהוּדָה. רַבִּי מֵאִיר אוֹמֵר, אֲפִלּוּ בִמְשִׁיחָה. אָמַר רַבִּי מֵאִיר, מַעֲשֶׂה בְאַנְשֵׁי יְרוּשָׁלַיִם, שֶׁהָיוּ אוֹגְדִין אֶת לוּלְבֵיהֶן בְּגִימוֹנִיּוֹת שֶׁל זָהָב. אָמְרוּ לוֹ, בְּמִינוֹ הָיוּ אוֹגְדִין אוֹתוֹ מִלְּמָטָּה:
The lulav may be bound only with its kind. These are the words of R. Yehudah. R. Meir says: Even with rope. R. Meir said: Once the men of Jerusalem bound their lulavim with gimoniyoth of gold [golden bands bent like a gimon (bulrush), as in (Isaiah 58:5): "to bend his head as an agmon."] They said to him: They bound it on the bottom with its kind [to fulfill the mitzvah of eged (the bond), and this (the gimoniyoth) was only for decorative purposes. R. Yehudah is consistent with his view that a lulav requires a bond, so that if he bound it with something not of its kind there are five species (instead of the prescribed four). And we hold that a lulav does not require a bond, for which reason the halachah here is in accordance with R. Meir.]