Skandapurana 5.161.60

5.161.60

kapilāyā mahāvīra sarvapāpaviśuddhaye ..
āṣāḍhe munipuṣpaiśca pūjayedbhāskaraṃ nṛpa .. 6.162.60 ..

[ghee] from a tawny cow, O mighty hero, for the purification of all sins. / In Āṣāḍha, one should worship the Sun with sage-flowers, O king;