5.
The Discourse on the Uprooting of Mental Corruptions
57.
"How, venerable sir, for one knowing, for one seeing, do mental corruptions go to uprooting?" etc.
The fifth.
Āsavasamugghāta Sutta [SN 35.57, PTS 4.32]
Also known as: Āsavasamugghātasuttaṃ