 Rabbi Sharabi initiated regulations, orders and "kawanot" ("intentions") of the daily prayers according to the "Nahar Shalom" prayer book (Salonika, 1806/5566) which he authored, continuing the teachings of the famed Arizal and following its cosmological approach.While incorporating profound kabbalistic symbolism, entreaties and thoughts/meditations, his system provides all intent and purpose of the mechanisms of prayer.Known today as the "Siddur haRashash", it stayed, together with the "Etz `Haim" of Rabbi `Haim Vital, at the center of all kabbalistic studies in the yeshiva.