Śatapatha Brāhmaṇa ("of a hundred paths") 3.8.4.8

3.8.4.8

tenānuyājeṣu carati | paśavo vā anuyājāḥ payaḥ pṛṣadājyaṃ tatpaśuṣvevaitatpayo dadhāti tadidam paśuṣu payo hitam prāṇo hi pṛṣadājyamannaṃ hi pṛṣadājyamannaṃ hi prāṇaḥ

Therewith they perform at the after-offerings. The after-offerings mean cattle, and clotted ghee means milk: hence he thereby puts milk into the cattle, and thus milk is here contained (or beneficial, Nita) in the cattle; for clotted ghee means breath, because clotted ghee is food, and breath is food.