[442] And how does a bhikkhu dwell contemplating feelings in feelings (vedanā) externally (bahiddhā)?
Here a bhikkhu understands one who is experiencing a pleasant feeling (sukhā vedanā) thus: 'He experiences a pleasant feeling'; he understands one who is experiencing a painful feeling (dukkhā vedanā) thus: 'He experiences a painful feeling'; he understands one who is experiencing a neither-painful-nor-pleasant feeling (adukkhamasukhā vedanā) thus: 'He experiences a neither-painful-nor-pleasant feeling'; he understands one who is experiencing a worldly (sāmisa) pleasant feeling thus: 'He experiences a worldly pleasant feeling'; or he understands one who is experiencing an unworldly (nirāmisa) pleasant feeling thus: 'He experiences an unworldly pleasant feeling'; he understands one who is experiencing a worldly painful feeling thus: 'He experiences a worldly painful feeling'; or he understands one who is experiencing an unworldly painful feeling thus: 'He experiences an unworldly painful feeling'; he understands one who is experiencing a worldly neither-painful-nor-pleasant feeling thus: 'He experiences a worldly neither-painful-nor-pleasant feeling'; or he understands one who is experiencing an unworldly neither-painful-nor-pleasant feeling thus: 'He experiences an unworldly neither-painful-nor-pleasant feeling.'
He cultivates that sign (nimitta), develops it, makes much of it, and defines it well. Having cultivated that sign, developed it, made much of it, and defined it well, he directs his mind (citta) to feelings both internally and externally (ajjhatta-bahiddhā).
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.