Dutiyasūriyasutta
“Yāvakīvañca, bhikkhave, candimasūriyā loke nuppajjanti, neva tāva mahato ālokassa pātubhāvo hoti mahato obhāsassa. Andhatamaṁ tadā hoti andhakāratimisā. Neva tāva rattindivā paññāyanti, na māsaddhamāsā paññāyanti, na utusaṁvaccharā paññāyanti.
The Simile of the Sun (2nd)
“Mendicants, as long as the moon and the sun don’t arise in the world, no great light or great radiance appears. Darkness prevails then, utter darkness. Day and night aren’t found, nor months and fortnights, nor seasons and years.