Bāhirānattātītānāgatasuttaṃ [SN 35.12, PTS 4.6]

12.

The Discourse on the External as Non-self in the Past and Future

12. "Forms, monks, are non-self, whether past or future; what then to say of the present! Seeing thus, monks, a learned noble disciple is without longing for past forms; he does not delight in future forms; he is practising for disenchantment, dispassion, and cessation of present forms. Sounds... Odours... Flavours... Tangible objects... Mental phenomena are non-self, whether past or future; what then to say of the present! Seeing thus, monks, a learned noble disciple is without longing for past mental phenomena; he does not delight in future mental phenomena; he is practising for disenchantment, dispassion, and cessation of present mental phenomena." The twelfth.