大毘盧遮那成佛經疏 10.32

10.32

所謂空者，即是諸法實相。猶行此行而得實相之果，復常以此而授與人也。今言噉食，即是以此空行噉一切能障菩提法也。

What is called emptiness is the dharmatā of all phenomena. Still practicing this practice, one attains the fruit of dharmatā and furthermore constantly bestows this upon others. Here speaking of devouring means devouring all phenomena that hinder bodhi through this practice of emptiness.