"Sir, the factors of stream-entry are associating with good people, listening to the true teaching, proper attention, and practicing in line with the teaching. ...the stream is simply this noble eightfold path, that is: right view, right thought, right speech, right action, right livelihood, right effort, right mindfulness, and right immersion. ...anyone who possesses this noble eightfold path is called a stream-enterer, the venerable of such and such name and clan."
January 1, 1970
https://en.wikiquote.org/wiki/%C5%9A%C4%81riputra