Shnei Luchot HaBrit (Shlah), ethics and fear of G-d, kabbalah and halachah, by R. Yeshayah HaLevi Horowitz; with Vavei HaAmudim by his son R. Sheftel Segal. Amsterdam: Immanuel Benveniste, 1648. First edition.

Shnei Luchot HaBrit contains many halachic novellae, kabbalistic principles, homiletics and ethics, incorporating all realms of the Torah. The book was received with awe throughout the Jewish world, and its teachings are quoted in the books of leading poskim and kabbalists. Many renowned Chassidic leaders were extraordinarily devoted to the study of the books of the Shlah.

The Bach, R. Yoel Sirkes, notably acclaimed the author and his works in his approbation to the Shaar HaShamayim siddur: "R. Yeshayah HaLevi… left behind blessing in his holy compositions, and when seeing and reading them we sensed the holiness from high above in all our limbs, and this is the sign that his works were composed for the sake of Heaven, to repair future generations…". The Tosefot Yom Tov writes in his approbation to the siddur: "He is a holy, awe-inspiring man… who was no doubt invested with a heavenly spirit".

Vavei HaAmudim is printed on the final 44 leaves, with a divisional title page.

Ownership inscriptions on title page, some deleted with ink, including: "I purchased with my wealth for the honor of my Rock and Maker, Chaim Hersh Mandel"; "I purchased with my wealth for the honor of my Rock and Maker… Yeshayah ---". Inscription of births on back endpaper (torn and partially lacking). Late gloss on p. 101a.