Rabbi Levi bar Sisi
Rabbi Levi bar Sisi was one of the Jewish Sages living in Eretz Yisroel during the transition period between the Tanaim and the Amoraim. He helped compile a number of Braisos. Rabbi Levi bar Sisi was a student of Rabbi Yehudah HaNasi. After the passing of Rav Ofes, he moved to Bavel where he studied with Abba bar Abba the father of Shmuel.
Rabbi Levi bar Sisi used to press his personal merit to get things accomplished. Once his city was surrounded by invading forces, Rabbi Levi took a Torah scroll in his arms, went up to the roof and said "Master of the Universe, if I have not fulfilled even one thing in this Torah scroll they should enter, if not they should leave". Immediately the forces departed.