Reference for Parah 12:1

הָאֵזוֹב הַקָּצָר, מְסַפְּקוֹ בְחוּט וּבְכוּשׁ, וְטוֹבֵל וּמַעֲלֶה, וְאוֹחֵז בָּאֵזוֹב וּמַזֶּה. רַבִּי יְהוּדָה וְרַבִּי שִׁמְעוֹן אוֹמְרִים, כְּשֵׁם שֶׁהַזָּיָה בָאֵזוֹב, כָּךְ טְבִילָה בָאֵזוֹב:

The short hyssop [which is not long enough to reach the bottom of the vessel containing the <i>chatat</i> waters], one should provide it with string or a rod and dip it, and raise it [out], and hold the hyssop and sprinkle with it. Rabbi Yehuda and Rabbi Shimon say: Just as sprinkling must be [done] with the hyssop, so too dipping must be [done] with the hyssop.

Jastrow