4.
The Discourse on Being Very Helpful
24. "Monks, there are these three persons of great service to a person. Which three? Monks, that person, having come to whom, a person has gone for refuge to the Buddha, has gone for refuge to the Teaching, has gone for refuge to the Community; this, monks, is a person of great service to this person.
"Furthermore, monks, that person, having come to whom, a person understands as it really is: 'This is suffering'; understands as it really is: 'This is the origin of suffering'; understands as it really is: 'This is the cessation of suffering'; understands as it really is: 'This is the practice leading to the cessation of suffering'; this, monks, is a person of great service to this person.
"Furthermore, monks, that person, having come to whom, a person, with the elimination of the mental corruptions, in this very life, having realised by direct knowledge himself, having attained, dwells in the liberation of mind and liberation by wisdom that are without mental corruptions; this, monks, is a person of great service to this person. These, monks, are the three persons of great service to a person.
"And further, monks, I say there is no other person of greater service to this person than these three persons. And further, monks, I say there is no easy repayment by this person to these three persons, that is to say, by paying respect, rising up in respect, salutation with joined palms, doing the proper duties, and providing robes, almsfood, lodging, and requisites of medicine for the sick." The fourth.