6.
The Discourse on the Stream-Enterer
496.
"There are, monks, these six faculties.
What are the six?
The eye faculty, etc.
the mind faculty.
Since, monks, a noble disciple understands as it really is the origin, passing away, gratification, danger, and escape of these six faculties -
this is called, monks, a noble disciple who is a stream-enterer, no longer subject to fall into lower realms, fixed in destiny, heading for the highest enlightenment."
The sixth.