Rabbi Elazar's best known Book, the
Sefer Haredim (), is a famous discussion of the 613 commandments and is one of the main works of Jewish
deontology. It was printed after his death in 1600. Its arrangement differs from other similar books: First, the commandments are arranged according to the human body and/or the time on which they depend in their observance; second, the work does not maintain a single count of the commandments but rather lists these according to the opinion of several
Rishonim. He also wrote a commentary on Tractates
Beitza and
Berakhot of the
Jerusalem Talmud. The
piyyut (liturgical poem)
Yedid Nefesh is commonly attributed to Elazar, who first published it in the
Sefer Haredim. ==References==