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The Buddha describes the three sensations - pleasant, painful, and neither-painful-nor-pleasant.
Paṭhamavedanā sutta - Sensations (First)
This was said by the Blessed One, said by the Arahant, as I have heard:
"There are these three sensations, bhikkhus. What three? Pleasant sensation, painful sensation, and neither-painful-nor-pleasant sensation. These, bhikkhus, are the three sensations."
The Blessed One spoke on this matter. In this regard, it is said:
"Collected, fully aware, a mindful disciple of the Buddha; Discerns sensations, and the arising of sensations.
Where these cease, and the way of practice leading to their cessation; With the cessation of sensations, the bhikkhu, is satiated and completely quenched [of mental defilements]."
This matter too was spoken by the Blessed One, as I have heard.