הרב אברהם דנציג

Chayei Adam is a work of Jewish law by Avraham Danzig (1748–1820), dealing with the laws discussed in the Orach Chayim section of the Shulchan Aruch. It is divided into 224 sections - 69 dealing with daily conduct and prayer, and 155 with Shabbos (Sabbath) and Yom Tov (holidays). It was initially published in 1801, and was published again in 1818 in the final years of Danzig's life.