At Sāvatthī.

“What do you think, Rāhula? Is eye contact permanent or impermanent?”

“Impermanent, sir.” …

“… ear contact … nose contact … tongue contact … body contact … Is mind contact permanent or impermanent?”

“Impermanent, sir.” …

“Seeing this, a learned noble disciple grows disillusioned with eye contact, ear contact, nose contact, tongue contact, body contact, and mind contact. Being disillusioned, desire fades away. …”