Jaiminīya (Talavakāra) Brāhmaṇa 2-7.268

2-7.268

vīryameṣa yajña iti
atho āhurya eva yugyayorvahīyānsa ālabhya iti
vīryeṇa ha vai sa tayorvahīyān
vīryameṣa yajña iti
tasminha śaunakaśca kāpeyo'bhipratāraṇaśca samūdāte yaḥkathaṃrūpassa ālabhya
iti
tau ha kṛṣṇapiśaṅge saṃpādayāṃ cakratuḥ
yasya śvetasya sataḥ kṛṣṇamasti kṛṣṇasya vā sata śvetaṃ sa eva saḥ
prajāpatinyaṅgaḥ
prajāpaterakṣyaśvayat
tatparāpatat
tadapaḥ prāviśat
tato'śvassamabhavat
yadaśvayattasmādaśvaḥ
yacchvayathossamabhavattasmātpūtiryadapaḥ prāviśattasmācchvetanaḥ | śvetavarṇaḥṣ
śvetasya vā vai sato'kṣṇaḥ kṛṣṇamasti kṛṣṇasya vā sata śvetam
sa eva sa prajāpatinyaṅgaḥ
tametadālabhante

Vital power is this sacrifice.' Then they say: 'He who of the two yoke-fellows is the stronger drawer is to be seized. For through vital power is he the stronger drawer of the two. Vital power is this sacrifice.' Regarding this, Śaunaka Kāpeya and Abhipratārin debated: 'Of what color and form is he that is to be seized?' The two agreed on a black and reddish-brown one: 'He who, being white, has black [marks], or being black, has white [marks]—that very one is the bodily mark of Prajāpati. Prajāpati's eye swelled; it fell away; it entered the waters. Thence the horse (aśva) arose. Because it swelled (aśvayat), therefore it is called horse (aśva). Because it arose from swelling, therefore it has a bad smell; because it entered the waters, therefore it is of a bright, white color. For an eye, being white, has black, or being black, has white. That very one is the bodily mark of Prajāpati. That one they seize on this occasion.'