妙法蓮華經文句 2.157

2.157

「教菩薩法」者，無量義處用教菩薩也，義處即諦理也。下文：「普令一切眾，亦同得此道」又云：「若我遇眾生，盡教以佛道」即此意焉。

Regarding "the Dharma to instruct the bodhisattvas": the locus of immeasurable meanings is used to instruct the bodhisattvas; the locus of meaning is indeed the principle of truth. As the text below says: "universally causing all the assembly / to likewise attain this Path"; and also says: "If I encounter sentient beings, / I instruct them all in the Buddha Path"—this is precisely the meaning.