Śatapatha Brāhmaṇa ("of a hundred paths") 4.3.4.15

4.3.4.15

tatho vo viśvavedā vibhajatviti | brahma vai tuthastadenā brahmaṇā vibhajati brahma vai dakṣiṇīyaṃ cādakṣiṇiyaṃ ca veda tatho hāsyaitā dakṣiṇīyāyaiva dattā bhavanti nādakṣiṇīyāya

'May the all-knowing Tutha distribute you!'--Now, Tutha is the Brahman: he thus distributes them by means of the Brahman. And the Brahman knows who is fit to receive a dakshinâ and who is unfit: thus these (cows) of his are given away only to him who is fit to receive a dakshinâ and not to him who is unfit.