大般涅槃經義記 3.126

3.126

上來一段攝正歸己，自下三句以正化彼。初「請大臣而共食」者化其弟子，弟子患輕所以先化。以法攝受名為「請臣」，自行大乘，勸彼同修，名「共食之」；二弟子勸師，以理曉示，名「共白王」，嘆依有法故言「快哉，大師有是不死藥也」；三師聞樂受，同勸悟解，名為「知已」，怨不早聞，故言「云何獨與諸臣服食甘露而不見分」。

The one section above gathered the correct to oneself; the three clauses from here down transform the other with the correct. First, 'invited the great ministers to consume it together' transforms his disciples; because the disciples' ailment was light, they were transformed first. Receiving them with the Dharma is called 'inviting the ministers'; personally practicing the Mahāyāna and exhorting them to cultivate it together is called 'consumed it together.' Second, the disciples exhort the master, illuminating and instructing him with the principle, which is called 'spoke together to the king'; praising the reliance as possessing the Dharma, they therefore say, 'How delightful! The great master has this medicine of immortality.' Third, the master, hearing this, joyfully accepts it, and sharing in their exhortation achieves awakening, which is called 'having known it'; resenting that he had not heard it sooner, he therefore says, 'Why do you consume the ambrosia alone with the ministers without sharing any with me?'