Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 5.2.8

5.2.8

vāg vai sarasvatī / (Cāturmāsya)

v. 2. In that he sacrifices to Agni and Soma first of the deities, it is because these are the deities of the new and full moon sacrifices; therefore to them first he sacrifices. In that he sacrifices to Savitṛ, and Savitṛ is lord of instigations, (it serves) for the creation of instigation by Savitṛ. In that he sacrifices to Sarasvatī, and Sarasvatī is speech, verily thus he delights speech. In that he sacrifices to Pūṣan and Pūṣan is he who yonder gives heat, verily thus he delights him. In that he sacrifices to the Maruts as impetuous, and the Maruts as impetuous are terrible, verily thus he makes healing. In that there is a milk mess for the All-gods, and the All-gods are all these gods, verily (it serves) to delight all the gods. In that there is (a cake) on one potsherd for the sky and earth, and sky and earth are supports, verily (it serves) for support. In that he gives an ox of the first birth, it is because that is a first ceremony. In that before or after the Çaṁyuvāka, he sacrifices to the steeds uninvited, and the steeds are the horses of the gods, verily thus he delights these steeds.