David ha-Levi Segal (c. 1586 – 20 February 1667), also known as the Turei Zahav (abbreviated Taz ()) after the title of his significant halakhic commentary on the Shulchan Aruch, was one of the greatest Polish rabbinical authorities. Biography Born in Ludmir, Volhynia, Segal was the son of Samuel ha-Levi Segal. His chief Torah teacher was his older brother, Isaac HaLevi Segal. He became a reputed Talmudic scholar, and married the daughter of Rabbi Joel Sirkis of Brest who was also known as the Bach (ב"ח), and quoted his father-in-law frequently in his works. He was also a Mohel. After residing with his father-in-law and continuing his Torah studies for several years, Segal and his family moved to Kraków. He was then appointed chief rabbi of Potelych (Polish: Potylicz), near Rava, where he lived in great poverty. Later he went to Poznań, where he remained for several years. Around 1641 he became rabbi of the old community of Ostrog, (or Ostroh), in Volhynia. There Segal established a famous yeshiva, and was soon recognized as one of the great halakhic authorities of his time. In Ostrog, Segal wrote a commentary on Joseph Caro's Shulchan Aruch (Yoreh De'ah), which he published in Lublin in 1646. This commentary, known as the Turei Zahav ("Rows of Gold"), was accepted as one of the highest authorities on Jewish law. Thereafter, Segal became known by the acronym of his work, the TaZ. Two years after the publication of his commentary, Segal and his family had to flee the massacres of the Cossack insurrection under Bogdan Chmielnicki in 1648–1649. Segal went to Uherský Brod, Moravia, where he remained for some time. Not happy in Moravia, he returned to Poland as soon as order was restored, settling in Lemberg, where he remained for the rest of his life. In Lemberg, Segal was appointed Av Beit Din (head of the rabbinical court). When Rabbi Meïr Sack, chief rabbi of Lemberg, died in 1653, he succeeded him in this position as well. Segal's last days were saddened by the death of his two sons, Mordechai and Solomon, who were killed in the riots occurring in Lemberg in the spring of 1664. His wife had died long before; now Segal married the widow of her brother, Samuel Hirz, Rav of Pińczów. His third son from his first marriage, Isaiah, and his stepson, Aryeh Löb, were the two Polish scholars who were