[728] How does one dwell contemplating feeling in feelings (vedanā)?
Here someone contemplates pleasant feeling as impermanent, not as permanent … he relinquishes, he does not grasp. Contemplating it as impermanent, he abandons the perception of permanence … relinquishing, he abandons grasping. In these seven ways he contemplates feeling. Feeling is the establishment (upaṭṭhāna), not the mindfulness; mindfulness is both the establishment and the mindfulness itself. With that mindfulness and that knowledge (ñāṇa) he contemplates that feeling. Therefore it is called "the development (bhāvanā) of the establishment of mindfulness (satipaṭṭhāna) that is contemplation of feeling in feelings."
Development: there are four kinds of development … development in the sense of repeated cultivation (āsevana) … Here someone [contemplates] painful feeling … neither-painful-nor-pleasant feeling, feeling born of eye-contact, feeling born of ear-contact, feeling born of nose-contact … relinquishing, he abandons grasping. In these seven ways he contemplates feeling. Feeling is the establishment, not the mindfulness; mindfulness is both the establishment and the mindfulness itself. With that mindfulness and that knowledge he contemplates that feeling. Therefore it is called "the development of the establishment of mindfulness that is contemplation of feeling in feelings."
Development: there are four kinds of development … development in the sense of repeated cultivation … Thus one dwells contemplating feeling in feelings.
[Editorial note in the Siam Raṭṭha source: "¹ In the Burmese edition the word 'iti' does not appear; likewise in similar passages."]
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.