Skandapurana 5.60.9

5.60.9

yayā'yaṃ calitaḥ śailaḥ svaśaktyā niścalīkṛtaḥ ..
skandeneha dvijaśreṣṭhāḥ śaktyā viddhastadagrataḥ .. ..
narādityastataścānyo yo nareṇa pratiṣṭhitaḥ ..
ṣaṣṭhyāṃ taṃ sūryavāreṇa dṛṣṭvā pāpātpramucyate .. 9 ..

by whom this mountain, when shaken, was made motionless through her own power. / Pierced in front of her with a spear by Skanda here, O best of the twice-born, / there is then another [shrine], Narāditya, which was installed by Nara. / Having seen it on the sixth day falling on a Sunday, one is freed from sin.