to atonement, for it tends to precipitate contrition. Therefore, the Bible requires fasting on Yom Kippur. Because, according to the Hebrew Bible, hardship and calamitous circumstances can occur as a result of sin, fasting is often undertaken by the community or by individuals to achieve atonement and avert catastrophe. Most of the Talmud's Tractate ''Ta'anit'' ("Fast[s]") is dedicated to the protocol involved in declaring and observing fast days.

;Commemorative