Saṃyutta Nikāya 35
Connected Discourses on the Six Sense Bases
6. The External as Nonself
“Bhikkhus, forms are nonself. What is nonself should be seen as it really is with correct wisdom thus: ‘This is not mine, this I am not, this is not my self.’
“Sounds … Odours … Tastes … Tactile objects … Mental phenomena are nonself. What is nonself should be seen as it really is with correct wisdom thus: ‘This is not mine, this I am not, this is not my self.’
“Seeing thus … He understands: ‘… there is no more for this state of being.’”