Mahadukkhakkhandhasutta 31.1

31.1

Ye hi keci, bhikkhave, samaṇā vā brāhmaṇā vā evaṃ rūpānaṃ assādañca assādato ādīnavañca ādīnavato nissaraṇañca nissaraṇato yathābhūtaṃ nappajānanti te vata sāmaṃ vā rūpe parijānissanti, paraṃ vā tathattāya samādapessanti yathā paṭipanno rūpe parijānissatīti—netaṃ ṭhānaṃ vijjati.

There are ascetics and brahmins who don’t truly understand forms’ gratification, drawback, and escape in this way for what they are. It’s impossible for them to completely understand forms themselves, or to instruct another so that, practicing accordingly, they will completely understand forms.