1.
The Discourse on Desire for the Internal as Impermanent
168.
"Whatever, monks, is impermanent, therein your desire is to be abandoned.
And what, monks, is impermanent?
The eye, monks, is impermanent;
therein your desire is to be abandoned. Etc.
The tongue is impermanent;
therein your desire is to be abandoned. Etc.
The mind is impermanent;
therein your desire is to be abandoned.
Whatever, monks, is impermanent, therein your desire is to be abandoned."