Leviticus 7:22-27

General Prohibition of Eating Fat and Blood (cf. Leviticus 3:6). The fat of sacrificial animals is to be offered to Yahweh; the fat of other animals may be used for anything except food. For disobedience to this prohibition, no atoning sacrifice avails. One of the most distinguishing marks of Judaism has been its avoidance of all save kosher meat.