Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 24.1.4

24.1.4

viśvajitā ajayann imāś catasro diśaḥ /

the Viçvajit they conquered these four quarters; therefore it has four turns and three endings. The Abhijit (is explained). By the Abhijit the gods conquered; what was left unconquered clung on as it were; that they conquered by the Viçvajit; the Viçvajit is so called (because they said) ‘All have we conquered.’ The Abhijit and the Viçvajit are these two, Indra and Agni; the Abhijit is Agni, for Agni conquered all this (universe); the Viçvajit is Indra, for Indra conquered all this wholly. The Abhijit has both Sāmans and all the Stomas; therefore both sets of hymns, those connected with the Bṛhat and the Rathantara, are recited. The two hymns, ‘Forward to the god, Agni’ and ‘What is best, that to Agni’ are its Ājya; ‘Forward’ is a symbol of the Rathantara; ‘aloud’ in ‘Sing aloud, O thou of wide radiance’ is (a symbol) of the Bṛhat. The two Praügas of Madhuchandas and Gṛtsamada should he interweave; having recited the Puroruc to Vāyu, then (he should insert) two triplets to Vāyu; then, having recited the Puroruc to Indra and Vāyu, two triplets to Indra and Vāyu; the Puroruc, then the two triplets, the Puroruc and then the two triplets; thus should he interweave. This he should not regard; he makes the triplets of Madhuchandas first, those of Gṛtsamada second. As to this they say ‘Why should he interweave the two (Praügas)? This he should not regard; the Praüga being that of Madhuchandas only, he should put on (the triplet) to the All-gods of Gṛtsamada above (the triplet) to the All-gods of Madhuchandas; there is one (hymn) with the Bṛhat character expressed.