Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.5.6

5.2.5.6

sa yadāgnāpauṣṇaḥ | ekādaśakapālaḥ puroḍāśo bhavatyagnirvai dātā pauṣṇāḥ paśavastadasmā agnireva dātā paśūndadāti

Now as to why there is that cake on eleven potsherds for Agni and Pûshan; Agni is the giver, and the cattle are Pûshan's: thus Agni, the giver, gives him cattle.