Catumahārājasutta
“Aṭṭhamiyaṁ, bhikkhave, pakkhassa catunnaṁ mahārājānaṁ amaccā pārisajjā imaṁ lokaṁ anuvicaranti: ‘kacci bahū manussā manussesu matteyyā petteyyā sāmaññā brahmaññā kule jeṭṭhāpacāyino uposathaṁ upavasanti paṭijāgaronti puññāni karontī’ti. Cātuddasiṁ, bhikkhave, pakkhassa catunnaṁ mahārājānaṁ puttā imaṁ lokaṁ anuvicaranti: ‘kacci bahū manussā manussesu matteyyā petteyyā sāmaññā brahmaññā kule jeṭṭhāpacāyino uposathaṁ upavasanti paṭijāgaronti puññāni karontī’ti. Tadahu, bhikkhave, uposathe pannarase cattāro mahārājāno sāmaññeva imaṁ lokaṁ anuvicaranti: ‘kacci bahū manussā manussesu matteyyā petteyyā sāmaññā brahmaññā kule jeṭṭhāpacāyino uposathaṁ upavasanti paṭijāgaronti puññāni karontī’ti.
The Four Great Kings (1st)
“On the eighth day of the fortnight, mendicants, the ministers and councillors of the four great kings wander about the world, thinking: ‘Hopefully most humans are paying due respect to their parents, ascetics and brahmins, honoring the elders in their families, observing and keeping vigil on the sabbath, and making merit.’ And on the fourteenth day of the fortnight, the sons of the four great kings wander about the world, thinking: ‘Hopefully most humans are paying due respect to their parents … and making merit.’ And on the fifteenth day sabbath, the four great kings themselves wander about the world, thinking: ‘Hopefully most humans are paying due respect to their parents … and making merit.’