Reference for Shabbat 52:1
ר' שמעון בן אלעזר ותנא דבי ר' ישמעאל אמרו דבר אחד ר' שמעון בן אלעזר הא דאמרן תנא דבי ר' ישמעאל מאי היא דתני דבי ר' ישמעאל הואיל ונאמרו בגדים בתורה סתם ופרט לך הכתוב באחד מהן צמר ופשתים מה להלן צמר ופשתים אף כל צמר ופשתים
R. Simeon b. Eleazar and the Tanna of the School of R. Ishmael<span class="x" onmousemove="('comment',' No particular Tanna is meant, but the collective view of that School. ');"><sup>1</sup></span> said the same thing. R. Simeon b. Eleazar, as stated. The Tanna of the School of R. Ishmael: what is that? For the School of R. Ishmael taught: Since garments are mentioned in the Torah unspecified, while the Writ specified wool and flax in the case of one of them: [then] just as there, wool and flax [are specified], so all [garments] are of wool and flax.<span class="x" onmousemove="('comment',' E.g., the uncleanness of garments caused by the carcases of forbidden animals (Lev. II, 25) or reptiles (v. 32): there the garments are unspecified. On the other hand, with respect to leprosy in garments wool and flax are specified: The garment also that the plague of leprosy is in, whether it be a woollen garment, or a linen garment.-Lev. XIII, 47. ');"><sup>2</sup></span> Raba said: They differ in respect to three [handbreadths] by three in other clothes [not wool or linen]: R. Simeon b. Eleazar accepts [their liability to defilement],<span class="x" onmousemove="('comment',' In his statement he employs the word shalosh, feminine, which must refer to fingerbreadths (ezba'oth, fem.). Hence they are not subject to the stricter law that even when only three fingerbreadths square they shall be liable to defilement. Whence it follows that they are subject to the next standard of liability, viz., three handbreadths (sheloshah, masc. agreeing with tefahim, handbreadths); v. infra. ');"><sup>3</sup></span>