[Kiliunjubl]

And how, O monks, should the nutriment sense-impression be considered?

Suppose, O monks, there is a skinned cow that stands close to a wall, then the creatures living in the wall will nibble at the cow; and if the skinned cow stands near a tree, then the creatures living in the tree will nibble at it; if it stands in the water, the creatures living in the water will nibble at it; if it stands in the open air, the creatures living in the air will nibble at it. Wherever that skinned cow stands, the creatures living there will nibble at it.

In that manner, I say, O monks, should the nutriment sense-impression be considered. If the nutriment sense-impression is comprehended, the three kinds of feeling are thereby comprehended. And if the three kinds of feeling are comprehended, there is, I say, no further work left to do for the noble disciple.

Puttamansa Sutta: A Son's Flesh so about Nutriment #2, my interpretation is just like the skinned cow, sense impression giving rise to feeling is unavoidable, including for the arahant. Thus the work to be done is to abandon craving & defilement in relation to sense impression & feeling.



"Here, ruler of gods, a bhikkhu has heard that nothing is worth clinging to. When a bhikkhu has heard that nothing is worth clinging to, he directly knows everything; having directly known everything, he fully understands everything; having directly known everything, he fully understood everything, whatever feeling he feels, whether pleasant or painful or neither pleasant or painful, he abides contemplating (observing) impermanence in those feelings, contemplating (observing) fading away, contemplating (observing) cessation, contemplating (observing) relinquishment (letting go). Contemplating (observing) thus, he does not cling to anything in the world. When he does not cling, he is not agitated, he personally attains Nibbana. He understands: ‘Birth is destroyed, the holy life has been lived, there is no more coming to any state of being.’ Briefly, it is in this way, ruler of gods, that a bhikkhu is liberated in the destruction of craving, one who has reached the ultimate end, the ultimate security from bondage, the ultimate holy life, the ultimate goal, one who is foremost among gods and humans.

MN 37 What, bhikkhus, is the Nibbana-element with residue left? Here a bhikkhu is an arahant, one whose taints are destroyed, the holy life fulfilled, who has done what had to be done, laid down the burden, attained the goal, destroyed the fetters of being, completely released through final knowledge. However, his five sense faculties remain unimpaired, by which he still experiences what is agreeable and disagreeable and feels pleasure and pain. It is the extinction of attachment, hate, and delusion in him that is called the Nibbana-element with residue left.

Itivuttaka: The Group of Twos Sensing a feeling of pleasure, one discerns that it is fleeting, not grasped at, not relished. Sensing a feeling of pain... Sensing a feeling of neither pleasure nor pain, one discerns that it is fleeting, not grasped at, not relished. Sensing a feeling of pleasure, one senses it disjoined from it. Sensing a feeling of pain... Sensing a feeling of neither pleasure nor pain, one senses it disjoined from it. When sensing a feeling limited to the body, one discerns that 'I am sensing a feeling limited to the body.' When sensing a feeling limited to life, one discerns that 'I am sensing a feeling limited to life.' One discerns that 'With the break-up of the body, after the termination of life, all that is sensed, not being relished, will grow cold right here.'

MN 140