Śatapatha Brāhmaṇa ("of a hundred paths") 7.2.2.10

7.2.2.10

atha jaghanārdhenodīcīm | ghṛtena sītā madhunā samajyatāmiti yathaiva yajustathā bandhurviśvairdevairanumatā marudbhiriti viśve ca vai devā marutaśca varṣasyeśata ūrjasvatī payasā pinvamāneti raso vai paya ūrjasvatī rasenānnena pinvamānetyetadasmāntsīte payasābhyāvavṛtsvetyasmāntsīte rasenābhyāvavṛtsvetyetat

Then on the hindpart (he ploughs a furrow) northwards, with (Vâg. S. XII, 70), 'With sweet ghee let the furrow be saturated,'--as the text so its meaning;--'approved of by the All-gods, by the Maruts!' for both the All-gods and the Maruts have power over the rain;--'sapful, and teeming with milk,'--milk means life-sap: thus, 'teeming with life-sap and food;'--'with milk, O furrow, turn thou unto us!' that is, 'with life-sap, O furrow, turn thou unto us!'