Śatapatha Brāhmaṇa ("of a hundred paths") 2.3.4.7

2.3.4.7

atha yasmādupaiva tiṣṭheta | uta vai yācandātāraṃ labhata evoto bhartā bhāryaṃ nānubudhyate sa yadaivāha bhāryo vai te 'smi bibhṛhi metyathainaṃ vedāthainam bhāryam manyate tasmādupaiva tiṣṭhetedamittu samastaṃ yasmādupatiṣṭheta

And again, why he should nevertheless approach (the fires). He alone that asks finds a giver; and the master, moreover, knows nothing of his dependent. But when the latter says, 'I am thy dependent: support me!' then he does know him, and feels himself bound to support him. Let him therefore approach (the fires). This then is the whole (argument) as to why one should approach (the fires).