[1346] Bhikkhus, when concentration (samādhi) through mindfulness of breathing (ānāpānasati) has been developed and cultivated in this way, if he feels a pleasant feeling (vedanā), he understands: 'It is impermanent'; he understands: 'It is not clung to'; he understands: 'It is not delighted in.' If he feels a painful feeling, he understands: 'It is impermanent'; he understands: 'It is not clung to'; he understands: 'It is not delighted in.' If he feels a neither-painful-nor-pleasant feeling, he understands: 'It is impermanent'; he understands: 'It is not clung to'; he understands: 'It is not delighted in.'
If he feels a pleasant feeling, he feels it detached; if he feels a painful feeling, he feels it detached; if he feels a neither-painful-nor-pleasant feeling, he feels it detached. When feeling a feeling terminating with the body, he understands: 'I feel a feeling terminating with the body.' When feeling a feeling terminating with life, he understands: 'I feel a feeling terminating with life.' He understands: 'With the breaking up of the body, following the exhaustion of life, all that is felt, not being delighted in, will become cool right here.'
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.