Asher Zebi of Ostrowo

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Asher Zebi ben David of Ostrowo was a 19th-century hasidic rabbi who served as Av Beit Din of Korets, Volhynia, and later as "maggid" (preacher) of Ostrowo, in the government of Lomza in Russian Poland. He was a pupil of Rabbi Dov Ber of Mezeritch.^[1][2]