She'ar Avot haTum'ah

HILCHOT SHA'AR AVOT HATUM'AH

The Laws of Other Primary Sources of Impurity

Included in this text are three positive commandments. They comprise the following:

1) the laws of the impurity of a dead animal;

2) the laws of the impurity of a dead crawling animal;

3) the laws of the impurity of semen.

False deities impart impurity like a dead crawling animal. This impurity is a Rabbinic decree.

These mitzvot are explained in the ensuing chapters.