BT Šab 155b(16) :לדידי חזי ההוא טייעא דאוכלא כורא ואטענה כורא‏ : I saw a certain Arab who fed it [i.e. the camel] a kor (of fodder) and loaded it with a kor
See the entire entry for kōr, kōrā n.m. kor: a measure of volume