 In the following year Weiss edited the Sifra with the commentary of Abraham ben David of Posquières; to this work he added a historical and linguistic introduction in nine chapters, and he provided the text with critical and exegetical notes entitled "Masoret ha-Talmud," giving the variants of different manuscripts as well as an index showing the parallel passages in both Talmudim.In 1864 Weiss took a prominent part in the Kompert trial, publishing a pamphlet entitled "Neẓaḥ Yisrael" in support of the testimony of Horowitz and Mannheimer with regard to the belief in the Messiah.This work called forth a reply by Nissan Schidhoff, entitled "Nesheḳ Bar" (Fürth, 1864).