瑜伽論記 10.147

10.147

第三明無礙解施，景云：此中謂於三施了達名體為他說法，即是法義二種無等行施，若了因果差別之理隨樂為說，即名樂說無礙，善達方言勸修三施即辨無礙。

In the third, explaining giving with unimpeded comprehension: Jing says: 'Here it means thoroughly understanding the names and entities of the three kinds of giving and expounding the Dharma for others; this is practicing giving with both the unimpeded [comprehension] of teachings and that of meanings. If one understands the principles of the differences between cause and effect and preaches according to their inclinations, this is called unimpeded eloquence. Skillfully mastering local dialects to exhort the cultivation of the three kinds of giving is unimpeded expression.'