 In 1947, Rabbi Horowitz settled in Mandatory Palestine, first in Tel Aviv where he was befriended by the Chazon Ish, and then in Jerusalem, where he came to be highly respected by Rabbi Yosef Tzvi Dushinsky, the head of the Edah HaChareidis.Rabbi Horowitz's uncle, Rabbi Eliezer Hager, urged him to become a Rebbe and continue the traditions of Dzikov.The former, however, was adamant in refusing to allow people to treat him as a Rebbe, though he acted for a time as principal of the "Kollel Tarbitza" in Jerusalem.