Śatapatha Brāhmaṇa ("of a hundred paths") 7.5.2.32

7.5.2.32

puruṣasya prathamamutsṛjati | taṃ hi prathamamupadadhātīmam mā hiṃsīrdvipādam paśumiti dvipādvā eṣa paśuryatpuruṣastam mā hiṃsīrityetatsahasrākṣo medhāya cīyamāna iti hiraṇyaśakalairvā eṣa sahasrākṣo medhāyetyannāyetyetanmayum paśum medhamagne juṣasveti kimpuruṣo vai mayuḥ kimpuruṣamagne juṣasvetyetattena cinvānastanvo niṣīdetyātmā vai tanūstena cinvāna ātmānaṃ saṃskuruṣvetyetanmayuṃ te śugṛcatu yaṃ dviṣmastaṃ te śugṛcatviti tanmayau ca śucaṃ dadhāti yaṃ ca dveṣṭi tasmiṃśca

He first removes that of the man--for him he puts down first--with (Vâg. S. XIII, 47), 'Harm not this two-footed animal!' the two-footed animal doubtless is the same as man: thus, 'do not harm that one!'--'(thou) the thousand-eyed, being built for pith;'--the thousand-eyed he (Agni) is on account of the chips of gold; 'for pith,' that is, 'for food.'--'Graciously accept thou, O Agni, the sham-man, the victim, as pith!' a sham-man is a kim-purusha (mock-man): thus, 'accept graciously the kim-purusha, O Agni!'--'Building up therewith thy forms, get thee settled!' the form is the self: thus, 'Building up therewith, perfect thyself!'--'Let thy burning heat reach the sham-man! let thy burning heat reach him whom we hate!' he thereby lays burning heat into the sham-man, and into him whom he hates.