Skandapurana 6.3.91.8

6.3.91.8

sa vasedbhāskare loke viriñcidivasaṃ nṛpa .
ghṛtena bodhayeddīpaṃ ṣaṣṭhyāṃ sa ca nareśvara .
mucyate sarvapāpaistu pratiyāti puraṃ raveḥ .. 91.8 ..

He dwells in the world of the Sun for a day of Brahmā, O king. / And whoever lights a lamp with ghee on the sixth day, O lord of men, / is freed from all sins and goes to the city of the Sun.