2.
The Discourse on Visible Forms
189.
He was dwelling at Sāvatthī, etc.
"What do you think, Rāhula, are forms permanent or impermanent?"
"Impermanent, venerable sir." Etc.
Sounds...
Odours...
Flavours...
Tangible objects...
Are mental phenomena permanent or impermanent?
"Impermanent, venerable sir." Etc.
"Seeing thus, Rāhula, a learned noble disciple becomes disenchanted with forms...
becomes disenchanted with sounds...
becomes disenchanted with odours...
becomes disenchanted with flavours...
becomes disenchanted with tangible objects...
becomes disenchanted with mental phenomena;
being disenchanted, he becomes dispassionate, etc.
he understands."
The second.