Samyuktagama (Sanskrit fragments) 404.8

404.8

「如是，諸比丘！我成等正覺，自所見法，為人定說者，如手中樹葉。所以者何？彼法義饒益、法饒益、梵行饒益、明、慧、正覺、向於涅槃。如大林樹葉，如我成等正覺，自知正法，所不說者，亦復如是。所以者何？彼法非義饒益，非法饒益，非梵行饒益、明、慧、正覺、正向涅槃故。是故，諸比丘！於四聖諦未無間等者，當勤方便，起增上欲，學無間等。」

“So it is, monks. The things seen by me after I achieved the complete and correct awakening and that I definitely explain for people are like the leaves in my hand. Why is that? Those teachings are beneficial to the aim, beneficial to the teaching, beneficial to the religious life and to insight, wisdom, correct awakening, and the way to Nirvāṇa.

“The correct teaching that I know but don’t teach is like the leaves of this great forest and like my achievement of complete awakening. Why is that? Those teachings are not beneficial to the aim, not beneficial to the teaching, not beneficial to the religious life, nor to insight, wisdom, correct awakening, and the correct way to Nirvāṇa. Therefore, monks, those who have yet to directly realize the four noble truths should apply themselves to the method, arouse increasing motivation, and train for that direct realization.”