Cūḷasakuludāyisutta

mn79:18.1 “Beyond this, Udāyī, I know very many gods on whom the luminosity of the sun and moon makes no impression.

mn79:18.2 Nevertheless, I do not say:

mn79:18.3 ‘The splendor compared to which no other splendor is finer.’

mn79:18.4 But of the splendor inferior to a firefly you say, ‘This is the ultimate splendor.’ And you don’t describe that splendor.”