4.
The Discourse on Subject to Impermanence
173.
At Sāvatthī.
Seated to one side, the venerable Rādha said this to the Blessed One:
"'Subject to impermanence, subject to impermanence', venerable sir, is said.
What indeed, venerable sir, is subject to impermanence?"
"Materiality, Rādha, is subject to impermanence, feeling is subject to impermanence, perception is subject to impermanence, activities are subject to impermanence, consciousness is subject to impermanence.
Seeing thus, etc.
He understands: ... there is no more coming back to any state of being.'"
The fourth.