sn.23.13 Saṁyutta Nikāya (Linked Discourses)
Impermanence
At Sāvatthī.Seated to one side, Venerable Rādha said to the Buddha:
“Sir, they speak of this thing called ‘impermanence’.
What is impermanence?”
“Rādha, form, feeling, perception, choices, and consciousness are impermanent.
Seeing this …
They understand: ‘… there is no return to any state of existence.’”