長阿含經 10.p79

10.p79

“What are the eight? Here, a monk lives according to the Bhagavān, or he might live according to a teacher, elder, or a wise religious practitioner. He becomes conscientious and modest, and he possesses affection and respect for them. This is the first cause and condition that gains knowledge before the religious life is attained and that increases knowledge once it has been attained.