2.
The Discourse on Impermanence Suitable for Nibbāna
147.
"I will teach you, monks, the practice suitable for Nibbāna.
Listen to that, etc.
And what, monks, is that practice suitable for Nibbāna?
Here, monks, a monk sees the eye as impermanent, sees material forms as impermanent, sees eye-consciousness as impermanent, sees eye-contact as impermanent.
Whatever feeling arises with eye-contact as condition - whether pleasant or unpleasant or neither-unpleasant-nor-pleasant - that too he sees as impermanent, etc.
He sees the tongue as impermanent, sees flavours as impermanent, sees tongue-consciousness as impermanent, sees tongue-contact as impermanent, whatever feeling arises with tongue-contact as condition - whether pleasant or unpleasant or neither-unpleasant-nor-pleasant - that too he sees as impermanent, etc.
He sees the mind as impermanent, sees mental phenomena as impermanent, sees mind-consciousness as impermanent, sees mind-contact as impermanent, whatever feeling arises with mind-contact as condition - whether pleasant or unpleasant or neither-unpleasant-nor-pleasant - that too he sees as impermanent.
This, monks, is that practice suitable for Nibbāna."
The second.