Shatapatha Brahmana 5.5.5.10

5.5.5.10

sarvānvā eṣa yajñakratūnavarunddhe | sarvā iṣṭīrapi darvihomānyo rājasūyena yajate tasya yātayāmeva yajño bhavati so 'smātparāṅiva bhavatyetāvānvai sarvo yajño yāvāneṣa trayo vedastasyaitadrūpaṃ kriyata eṣa yonirāśayastadetena trayeṇa vedena punaryajñamārabhate tathāsyāyātayāmā yajño bhavati tatho asmānna parāṅ bhavati

For, verily, he who performs the Râgasûya gains for himself (the benefit of) all sacrificial rites, all offerings, even the spoonful-oblations; for him the sacrifice becomes as it were exhausted, and he, as it were, turns away from it. Now the whole sacrifice is just as great as that triple Veda; and this (offering) now is made a form of that (Veda, or sacrifice); this is its womb, its seat: thus he commences once more the sacrifice by means of that triple Veda; and thus his sacrifice is not exhausted, and he does not turn away from it.