Śatapatha Brāhmaṇa ("of a hundred paths") 13.4.3.5

13.4.3.5

sāvitryā eveṣṭeḥ purastādanudrutya sakṛdeva rūpāṇyāhavanīye juhotyatha sāyaṃ dhṛtiṣu hūyamānāsu rājanyo vīṇāgāthī dakṣiṇata uttaramandrāmudāghnaṃstisraḥ svayaṃsambhṛtā gāthā gāyatītyayudhyatetyamuṃ saṃgrāmamajayaditi tasyoktam brāhmaṇam

Prior to the (first) offering to Savitri he offers, once only, the (oblations relating to the) Forms in the Âhavanîya fire, whilst going rapidly over (the formulas). And in the evening, whilst the Dhritis (oblations for the safe keeping of the horse) are being offered, a Râganya lute-player, striking up the uttaramandrâ (tune) south (of the vedi), sings three stanzas composed by himself (on topics such as), 'Such war he waged,--Such battle he won:' the meaning of this has been explained.