大般涅槃經義記 3.59

3.59

第三段中，「有善呪者」喻於菩薩。「以呪力」者，大乘法力能令龍等皆悉調善。「任為乘」者明降魔能化，彼諸魔及聲聞人同歸大乘名為調善，堪為受法傳化弟子名任御乘。

In the third passage, "there is a master of good incantations" is an analogy for the bodhisattva. "By the power of the incantation" refers to the power of the Mahāyāna Dharma being able to make the dragons and others entirely gentle and good. "Fit to be used as a mount" clarifies that having subdued Māra, he can convert them: those Māras and śrāvaka persons returning together to the Mahāyāna is called "gentle and good"; being capable of becoming disciples who receive the Dharma and transmit conversion is called "fit to be driven as a mount."