… “Venerable sir, how should one know, how should one see, for the fetters to be abandoned?”
The Buddha’s reply is as above.
SN35.54: Saṁyojanappahānasutta
Saṁyojanappahānasutta: Abandoning the Fetters - translated by Bhikkhu Bodhi
Translated by Bhikkhu Bodhi. Source text via SuttaCentral.