Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.5.2

5.2.5.2

sa yadāgnāvaiṣṇavaḥ | ekādaśakapālaḥ puroḍāśo bhavatyagnirvai dātā vaiṣṇavāḥ puruṣāstadasmā agnirdātā puruṣāndadāti

Now as to why there is that cake on eleven potsherds for Agni and Vishnu;--Agni is the giver, and men are Vishnu's: thus Agni, the giver, gives him (the king) men.