四分律刪繁補闕行事鈔 3.134

3.134

三護淨法五門：一翻淨，二護淨，三罪通塞，四互明淨染，五儉緣開八事。

Third, the methods for protecting purity comprise five sections: 1. Purifying through turning; 2. Protecting purity; 3. Applicability and non-applicability of offenses; 4. Mutual explanation of purity and defilement; 5. The eight matters permitted due to conditions of famine.