 In 1870 he was chosen rabbi of Warsaw and held the office for about four years, when he was compelled to relinquish it on account of not being acceptable to the chasidim.He finished "Sifte Kohen" at the age of eighteen.At twenty-three he wrote "Tiferet Yaakov", on "Shulchan Aruch" Choshen Mishpat (Warsaw, 1842), but the larger part of the edition was destroyed by order of the censor (see Fürst, "Bibliotheca Judaica" v. 3).