大般涅槃經義記 3.319

3.319

就下一喻況一法中，初偈立喻，「如蘇、醍醐及以石蜜」舉其喻體，此諸事中取一為喻，非是並取。「服消則藥、不消則毒」明其損益。後偈合之，「方等如是」合蘇、醍醐及石蜜等，「智為甘露」合消為藥，「不知成毒」合後不消則為毒藥。

In the [section where] the latter one analogy illustrates one dharma, the first verse sets up the analogy: "like butter, ghee, and rock sugar" adduces the substances of the analogy; among these matters, one is taken as an analogy, not taken all together. "If digested when taken, it is medicine; if undigested, it is poison" explains its harm and benefit. The latter verse applies it: "vaipulya is like this" applies to butter, ghee, rock sugar, and so forth; "wisdom makes it ambrosia" applies to digesting it as medicine; "not knowing makes it poison" applies to the latter, undigested becoming poison.