Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 30.3.9

30.3.9

tat sa vālakhilyābhir vikaroti / (soma: hotraka śastrāṇi(tṛtīya savanam))

xxx. 4. With the Nābhānediṣṭha the Hotṛ sprinkles seed; it he hands to the Maitrāvaruṇa; it he develops with the Vālakhilyās; these Vālakhilyās he recites as divided; by Padas the first two hymns he divides; verily thus