Rashi on Exodus 30:24/רש"י על שמות ל׳:כ״ד

1וקדה AND OF CASSIA [FIVE HUNDRED SHEKEL] — קדה is the name of a root of a certain herb. In the language of our Sages it is called קציעה (cf. Onkelos).

2הין ONE HIN — twelve logs. The Sages in Israel are of different opinions as to the purpose of the oil. R. Meir said: in it the roots were boiled. Whereupon R. Jehuda said to him: Surely it (the quantity of oil) was not sufficient even to smear the roots with it, but they were steeped in water so that, being saturated with it, they should not absorb the oil; the oil was then poured upon them and they were left thus until it (the oil) absorbed their scent and then they skimmed the oil off the roots (Horayot 11b; Keritot 5a).