Brahmapurana 61.23

Brahmapurāṇa 61.23

caturbhujaṃ mahāsattvaṃ sūryakoṭisamaprabham
cintayitvā mahāyogaṃ jyotīrūpaṃ sanātanam
tataś cāvāhayen mantraṃ krameṇācintya mānase //