大般涅槃經義記 5.346

5.346

第三段中，「四無量心能為一切諸善根本」總明慈等能生實行，下別顯之。別中，且就一慈以論，餘類可知。於中先明出生大乘不共善法，「聲聞、緣覺、菩薩、諸佛慈為本」下出生三乘共行善法。

In the third section, "The four immeasurable minds can serve as the root of all goods" generally explains that benevolence and the others can generate real practice; below, it explains this specifically. In the specific explanation, it discusses it tentatively in terms of benevolence alone; the rest can be understood by analogy. Therein, it first explains the generation of the unshared wholesome dharmas of the Mahāyāna; from "Śrāvakas, pratyekabuddhas, bodhisattvas, and buddhas take benevolence as their root" onward, it explains the generation of the wholesome dharmas practiced in common by the three vehicles.