The Related Suttas Collection 22.128

13. Ignorance

Liable To Originate (3rd)

At one time Venerable Sāriputta and Venerable Mahākoṭṭhita were staying near Varanasi, in the deer park at Isipatana. …

Mahākoṭṭhita said to Sāriputta:

“Friend Sāriputta, they speak of this thing called ‘knowledge’. What is knowledge? And how is a knowledgeable person defined?”

“Friend, it’s when a learned noble disciple truly understands form, which is liable to originate … liable to vanish … liable to originate and vanish, as form which is liable to originate and vanish.

They truly understand feeling … perception … functioning patterns … consciousness, which is liable to originate … liable to vanish … liable to originate and vanish, as consciousness which is liable to originate and vanish.

This is called knowledge. And this is how a knowledgeable person is defined.”