Study Chullin folio 120A with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
maintaining that the dispute is with regard to that which is taught in the Mishnah: The attached hide, and the congealed gravy attached to the meat, and the spices, and the meat residue, and the bones, and the tendons, and the horns, and the hooves all join together with the meat to constitute the
Reish Lakish said: The rabbis taught that only a bone and the other items mentioned in the Mishnah join together with the meat to constitute the requisite measure to impart impurity because they constitute protection for the meat. But a hair does not join together with the meat to constitute the re
Reish Lakish said to R' Yoḥanan: But the hide protects the flesh, and the hair is on top of the hide. Is the halakha of protection applicable with regard to protection that is on top of another protection? R' Yoḥanan answered: The hair penetrates through the hide and touches the flesh, thereby prov
Rav Aḥa objects to this answer: If that is so, that there are perforations in the hide through which the hairs penetrate, how can we write tefillin? Don’t we require tefillin to be written with a perfect writing with no perforations in the letters? And that is not possible if there are perforations
The Talmud answers: That halakha which they say in the West, Eretz Yisrael, escaped Rav Aḥa: Any perforation over which the ink passes and which it covers is not considered a perforation that invalidates the writing.