Śatapatha Brāhmaṇa ("of a hundred paths") 3.1.4.1

3.1.4.1

sarvāṇi ha vai dīkṣāyā yajūṃṣyaudgrabhaṇāni | udgṛbhṇīte vā eṣo 'smāllokāddevalokamabhi yo dīkṣata etaireva tadyajurbhirudgṛbhṇīte tasmādāhuḥ sarvāṇi dīkṣāyā yajūṃṣyaudgrabhaṇānīti tata etānyavāntarāmācakṣata audgrabhaṇānītyāhutayo hyetā āhutirhi yajñaḥ paro 'kṣaṃ vai yajurjapatyathaiṣa pratyakṣaṃ yajño yadāhutistadetena yajñenodgṛbhṇīte 'smāllokāddevalokamabhi

All formulas of the consecration are audgrabhana (elevatory), since he who is consecrated elevates himself (ud-grabh) from this world to the world of the gods. He elevates himself by means of these same formulas, and therefore they say that all formulas of the consecration are 'audgrabhana.' Now they also (specially) designate these intermediate ones as 'audgrabhana,' because these are libations, and a libation is a sacrifice. For the muttering of a sacrificial formula is an occult (form of sacrifice), but a libation is a direct (form of) sacrifice: hence it is by this same sacrifice that he elevates himself from this world to the world of the gods.