MSam(1) 41:6 :ר׳ יהושע בר גזורא‏ :
See the entire entry for gāzōr, gāzōrā nom.ag. circumciser, cutter

MSam(1) 41:6 :כל כרביא בישין וכרביא דאורייתא טבין‏ : all plowings are bad, but "plowings" of the Torah are good
See the entire entry for krāḇ, krāḇā v.n. plowing