Vedanāsaṃyutta

Sallasutta (The Discourse on the Arrow)13S4/2.1.6, the simile of the arrow: touched by a painful feeling the unlearned ordinary person feels a second, mental feeling and is fettered by the underlying tendencies, while the learned disciple of the liberated feels the bodily feeling alone and is unfettered.

Rahogatasutta (The Discourse on One Gone into Seclusion)13S4/2.2.1: a bhikkhu asks how ‘whatever is felt is within suffering’ stands beside the three feelings, and the Bhagavā answers with the impermanence of mental constructions and their successive cessation, subsiding and tranquillising through the jhāna and the formless attainments.

Sīvakasutta (The Discourse to Sīvaka)13S4/2.3.1: the renunciant Moḷiyasīvaka asks whether all that is felt is caused by past deeds, and the Bhagavā names eight causes of feeling, known by oneself and agreed by the world, which that view overshoots.