Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 29.2.4

29.2.4

vasiṣṭho ha madhyaṃdina indrāya somam provāca /

xxix. 2. When the Pavamāna has been sung, they proceed with the pot of milk, for this is the time for it; moreover (it serves) to secure the sap of the pressing. Then they proceed with the sacrifice of five oblations; the explanation of this has been given. (Verses) by Vasiṣṭha he repeats for (the goblets) being filled at the midday (pressing); Vasiṣṭha it was who proclaimed the Soma to Indra at the midday. They contain (the words) ‘hither’ and ‘bay steeds’, with the symbols of the invitatory verses. They are Triṣṭubh verses to Indra, for the midday pressing is connected with Indra and the Triṣṭubh. Ten he recites; ten goblets do they fill here. Then the Hotrakas sacrifice together; the explanation of this has been given. Triṣṭubh verses to Indra they use as offering verses for the Prasthitas at the midday (pressing), for the midday pressing is connected with Indra and the Triṣṭubh. They say the second _vaṣaṭ_, for the healing of the libations, for the support of the libations. Then comes the sacrificial food, then the goblet of the Hotṛ; the explanation of this has been given; when the Dakṣiṇā offerings have been made, the sacrificial fees are taken; the explanation of these has been given. He recites (a verse) by Viçvāmitra as the invitatory verse for the cup for the Maruts; the explanation of this has been given.