Vayupurana 2.36.68

Vāyupurāṇa 2.36.68

ṣaṇḍāmārkaprabhāvaṃ na jānīmastva surairvayam.
tasmādyajñaṃ samuddiśya kāryyaṃ cātmahitañca yat .. 36.63 ..