Rabbi BenZion Halberstam, the second Rebbe of Bobov, smoked cigars.
When his doctor told him that smoking is unhealthy,
he quit smoking immediately and never smoked again.
SOURCE: Gut Voch (paragraph titled: Will Power To Live,
found in chapter 7, on page 84) by Avrohom Barash,
year 1998 CE, Mesorah Publications, Brooklyn,
New York, ISBN 1-57819-273-9 (paperback)
Grand Rabbi Ben Zion Halberstam HYD (born 1874 CE, died 1941 CE)
succeeded his father as the second Rebbe of Bobov at the age of 31.
He wrote a commentary on the Torah called Kedushas Tzion.
He was murdered by Nazis.