Jaiminīya (Talavakāra) Brāhmaṇa 4.15.p1

4.15.p1

pra somāso madacyuta
ityārbhavasya pavamānasya pravatīrgāyatryo bhavanti rāthantare'han
praṇinīṣeṇyaṃ vā etadahaḥ
preti gāyatryai rūpam
gāyatryā evaitadrūpeṇa prayanti
tā madvatīrbhavanti
raso vai madaḥ
dhītamivaitadyattṛtīyasavanam
tadyadetā madvatīrbhavanti | rasamevāsminnetaddadhati
ṣavainadetena pyāyayanti

"Forward the somas dripping intoxication"—thus there are Gāyatrī verses containing [the word] "forward" (pra) for the Ārbhava Pavamāna on a Rathantara day. For this day is one on which they wish to advance. "Forward" is the form of the Gāyatrī. With the form of the Gāyatrī they advance. They contain [the word] "intoxication" (mada). Intoxication is indeed sap. The third pressing is as it were drained. Since these [verses] contain [the word] "intoxication", they place sap in it; they swell it with sap.