Shatapatha Brahmana 10.3.5.16

10.3.5.16

tasya ha yo niruktamāvirbhāvaṃ veda āvirbhavati kīrtyā yaśasopāṃśu yajuṣādhvaryurgrahaṃ gṛhṇāti gṛhītaḥ sanna āvirbhavatyupāṃśu yajuṣāgniṃ cinoti citaḥ saṃcita āvirbhavatyupāṃśu yajuṣā havirnirvapati śṛtaṃ niṣṭhitamāvirbhavatyevaṃ yatkiṃ copāṃśu karoti kṛtaṃ niṣṭhitamāvirbhavati tasya ha ya etamevaṃ niruktamāvirbhāvaṃ vedāvirbhavati kīrtyā yaśasā brahmavarcasena kṣipra u haivāvidaṃ gacati sa ha yajureva bhavati yajuṣainamācakṣate

And, assuredly, he who knows the indistinct (secret) manifestation of this (Yagus) becomes manifest in fame and glory. Silently the Adhvaryu draws the cup of Soma with the (muttered) Yagus, and, when drawn and deposited, it becomes manifest;--silently he builds the fire-altar with the Yagus, and, when built and completed, it becomes manifest;--silently he takes out (material for) the oblation with the Yagus, and, when cooked and ready (for offering), it becomes manifest: thus, whatever he performs silently, when performed and completed, it becomes manifest. And, assuredly, he who thus knows this secret manifestation of this (Yagus) becomes manifest in fame, and glory, and sanctity; and quickly, indeed, he becomes known: he becomes the Yagus itself, and by the Yagus people call him.