Reference for Bava Metzia 182:12

ואם תמצי לומר עושה בגפן זה לא יאכל בגפן אחר שור במחובר היכי אכיל אמר רב שישא בריה דרב אידי בשרכא

Is it necessary that [the work shall be done] with all its [sc. the creature that threshes] strength, which provision is complied with? Or perhaps, it must work with its fore-feet and hind-feet, which is here absent? — The problem remains unsolved.

Jastrow

Jastrow