Śatapatha Brāhmaṇa ("of a hundred paths") 4.4.4.14

4.4.4.14

yajña yajñaṃ gaca | yajñapatiṃ gaca svāṃ yoniṃ ghaca svāheti tatpratiṣṭhitamevaitadyajñaṃ santaṃ svāyāṃ yonau pratiṣṭhāpayatyeṣa te yajño yajñapate sahasūktavākaḥ sarvavīrastaṃ juṣasva svāheti tatpratiṣṭhitamevaitadyajñaṃ santaṃ sahasūktavākaḥ sarvavīraṃ yajamāne 'ntataḥ pratiṣṭhāpayati

[The eighth with Vâg. S. VIII, 22], 'O sacrifice, go to the sacrifice, go to the lord of the sacrifice, go to thine own womb, Hail!'--the sacrifice, thus established, he thereby establishes in its own womb. [The ninth he offers with], 'This is thy sacrifice, O lord of the sacrifice, bestowing numerous heroes, together with the song of praise: do thou accept it, Hail!' the sacrifice, thus established, bestowing numerous heroes, together with the song of praise he thereby finally establishes in the sacrificer.