Shatapatha Brahmana 13.6.2.12

13.6.2.12

niyuktānpuruṣān brahmā dakṣiṇataḥ puruṣeṇa nārāyaṇenābhiṣṭauti sahasraśīrṣā puruṣaḥ sahasrākṣaḥ sahasrapādityetena ṣoḍaśarcena ṣoḍaśakalam vā idaṃ sarvaṃ sarvam puruṣamedhaḥ sarvasyāptyai sarvasyāvaruddhyā itthamasītthamasītyupastautyevainametanmahayatyevātho yathaiṣa tathainametadāha tatparyagnikṛtāḥ paśavo babhūvurasañjñaptāḥ

By means of the Purusha Nârâyana (litany), the Brahman priest (seated) to the right (south) of them, praises the men bound (to the stakes) with this sixteen-versed (hymn, Rig-v. X, 90, Vâg. S. XXXI, 1-16), 'The thousand-headed Purusha, thousand-eyed, thousand-footed...;'--thus (he does) for the obtainment and the securing of everything, for everything here consists of sixteen parts, and the Purushamedha is everything: in thus saying, 'So and so thou art, so and so thou art,' he praises and thereby indeed magnifies him (Purusha); but he also thereby speaks of him, such as he is. Now, the victims had had the fire carried round them, but they were not yet slaughtered,--