Reference for Chullin 60:17

אי ממתני' ה"א

- From that Mishnah, I might have argued that only there [is the slaughtering invalid] because he cut the organs from below upwards, which is not the usual way of slaughtering, but where he cut the organs from above downwards, which is the usual way of slaughtering.

Jastrow

Jastrow

Jastrow

Jastrow