成唯識論述記 10.292

10.292

述曰：「辯無礙解」，能為巧便說甚深法，即是七辯：迅辨、應辨、捷辯、無疎謬辯、無斷盡辯、凡所演說豐義味辯、一切世間最勝妙辯，高下、清濁、小大等是。

The Commentary states: 'Unhindered understanding of eloquence' means being able to skillfully expound the extremely profound Dharma; that is, the seven kinds of eloquence: swift eloquence, responsive eloquence, nimble eloquence, unerroneous eloquence, uninterrupted eloquence, eloquence rich in meaning and flavor in all that is expounded, and the most supreme and marvelous eloquence in all worlds, with high and low, clear and turbid, small and large, and so forth.