釋氏要覽 3.9

3.9

中觀論云。真法及說者聽者難得故○涅槃經云。一樂說難。二樂聞難。

The Madhyamaka-śāstra says: “The true Dharma and those who expound it and listen to it are difficult to find.” The Nirvāṇa Sūtra says: “First, it is difficult to delight in expounding; second, it is difficult to delight in hearing.”