四分律行事鈔資持記 3.113

3.113

四中，初敘親行。水塵者，《雜心論》云：七極微成一阿耨塵；彼是細色，唯天眼及菩薩輪王見；七阿耨為銅上塵，七銅上塵為一水上塵，七水上塵為一兔毫塵等。緻練即堅密熟絹。故下，次明述意。無益自他者，己成殺業，他遭殘害。性戒無懺，業不亡故。

In the fourth part, it first narrates personal practice. Regarding 'water-dust', the *Abhidharma-hṛdaya-śāstra* says: 'Seven paramāṇus make one aṇu dust particle; that is subtle form, seen only by the divine eye, bodhisattvas, and cakravartin kings; seven aṇus make one dust particle on copper; seven dust particles on copper make one dust particle on water; seven dust particles on water make one dust particle on a hare's hair, etc.' 'Dense boiled silk' means sturdy, dense, degummed silk. Under 'Therefore...', it next explains the intended meaning. 'Benefiting neither oneself nor others': oneself creates killing karma, and others suffer harm. Natural precepts admit no repentance, because the karma is not eradicated.