Dutiyavalāhakasutta
“Cattārome, bhikkhave, valāhakā. Katame cattāro? Gajjitā no vassitā, vassitā no gajjitā, neva gajjitā no vassitā, gajjitā ca vassitā ca. Ime kho, bhikkhave, cattāro valāhakā. Evamevaṁ kho, bhikkhave, cattāro valāhakūpamā puggalā santo saṁvijjamānā lokasmiṁ. Katame cattāro? Gajjitā no vassitā, vassitā no gajjitā, neva gajjitā no vassitā, gajjitā ca vassitā ca.
Clouds (2nd)
“Mendicants, there are these four kinds of clouds. What four? One thunders but doesn’t rain, one rains but doesn’t thunder, one neither thunders nor rains, and one both rains and thunders. These are the four kinds of clouds. In the same way, these four individuals similar to clouds are found in the world. What four? One thunders but doesn’t rain, one rains but doesn’t thunder, one neither thunders nor rains, and one both rains and thunders.