Śatapatha Brāhmaṇa ("of a hundred paths") 2.3.4.25

2.3.4.25

atha gāmabhyaiti | andha sthāndho vo bhakṣīya maha stha maho vo bhakṣīyeti yāni vo vīryāṇi yāni vo mahāṃsi tāni vo bhakṣīyetyevaitadāhorja sthorja vo bhakṣīyeti rasa stha rasaṃ vo bhakṣīyetyevaitadāha rāyaspoṣa stha rāyaspoṣaṃ vo bhakṣīyeti bhūmā stha bhūmānaṃ vo bhakṣiyetyevaitadāha

He then approaches the cow, with the text (Vâg. S. III, 20), 'Food ye are: may I enjoy your food! wealth ye are: may I enjoy your wealth!'--whereby he means to say, 'whatever energies are yours, whatever riches are yours, may I enjoy them.'--'Strength ye are: may I enjoy your strength!' whereby he says, 'sap ye are: may I enjoy your sap!'--'Affluence ye are: may I enjoy your affluence!' whereby he says, 'abundance ye are: may I enjoy your abundance!'