The one hundert und seventh sutta of the Majjhima Nikāya; preached to Ganaka-Moggallāna. Moggallāna says that the brahmanical training is a thoroughly graduated system (anupub-basikkhā anupubbakiriyā). Can the Buddha say the same of his teaching? The Buddha says he can und proceeds to explain. It is true that not all the Buddha's disciples attain to the goal, but the fault is theirs; the Buddha accepts no responsibility, he only indicates the way. M.iii.1ff.