Jaiminīya (Talavakāra) Brāhmaṇa 2-7.246

2-7.246

idameva prathamenāhnā vyakarodyadasyāmāyattamūlamidaṃ dvitīyena
yatprāṇadejatyadastṛtīyena yadvarṣati yannakṣatrāṇi yadamuṃ lokaṃ bheje
mahāvrataṃ vā etadyadeṣa trirātrasya
yānyeteṣāmahnāṃ bahiṣpavamānāni tacchiraḥ
ye'bhito'hanī tau pakṣau
yanmadhyamamahassa ātmā
agniṣṭomasāmānyeva puccham
atho āhuryadevāsāvudeti tacchiraḥ
ye'bhito'hanī tau pakṣau
yanmadhyamamahassa ātmā
agnireva puccham
atho āhurya evāsāvudeti tacchiraḥ
ye'bhito'hanī tau pakṣau
yanmadhyamamahassa ātmā
yadevāstameti tatpucchamiti

By the first day he developed this very [world], what has taken root in it; by the second, what breathes and moves; by the third, that [world] above, what rains, what is the stars, what fell to the share of that world. This, indeed, is the Mahāvrata of the three-day rite: what the Bahiṣpavamāna [stotras] of these days are, that is the head; the two days on either side are the two wings; the middle day is the trunk; the Agniṣṭoma-sāmans are the tail. Moreover, they say: the fact that that [sun] rises, that is the head; the two days on either side are the two wings; the middle day is the trunk; Agni is the tail. Moreover, they say: he who rises there, that is the head; the two days on either side are the two wings; the middle day is the trunk; the fact that he sets, that is the tail.