Bhagavad Gita -Sri Madhvacharya
(Bhashya and Tatparya Nirnaya)
Bhashya :- Krishna speaks of the different forms of sacrifices to the divinities and others, दैवम् means to the Resplendent Lord. He, verily, is the Sacrifice for them. The propitiation of the Resplendent Lord is the sacrifice; this is the distinctive attribute of performance of action. For the recluse apart from this, there exists nothing else. यज्ञ, Sacrifice itself is the Resplendent Lord. By performance of Sacrifice in the Sacrifice, Sacrifice is the Divine Vishnu thus, the scriptures have spoken. यज्ञेन means that which has become famous as sacrifice. Through performance of sacrificial act यज्ञ, the oblations are offered in the sacrifice, यज्ञम, thus everything is said to be तां यज्ञम् - to Him are the Sacrifices. Brahma, the Grandsire, by way of mental sacrifice, offered his eldest son, Rudra himself, as the animal, (as sacrificial oblation), to his father Vishnu, thus has it been said.