992. The Volume of Food That Renders One Liable

Shvisas Asor 2:1

On Yom Kippur, one is liable for eating a volume of food that is fit for human consumption the size of a large, ripe date, which is slightly smaller than the volume of an egg. All types of food that one may eat combine to form this volume. Similarly, drinking a cheekful of liquid fit for humans renders one liable. The size of a cheekful is not fixed; it is based on the size of each individual’s cheeks. The definition of a cheekful is enough liquid for a one to push to one side of his mouth, making his cheek appear full. This is less than a reviis (approximately 3.3 ounces) for most people. All beverages that one may drink combine to form this volume. Food and beverages do not combine to form a single volume.

Shvisas Asor 2:2

A person is liable for the penalty of kareis if he eats, on Yom Kippur, food that is fit for human consumption. It makes no difference whether the food is inherently permitted or prohibited. This includes sacrifices that were offered with invalid intentions (piggul) or that remained past their designated periods (nosar), untithed produce (tevel), meat from an animal that died without ritual slaughter, meat from an animal that was torn by a predator, forbidden fats and blood.