Śatapatha Brāhmaṇa ("of a hundred paths") 5.3.1.10

5.3.1.10

atha śvo bhūte | akṣāvāpasya ca gṛhebhyo govikartasya ca gavedhukāḥ sambhṛtya sūyamānasya gṛhe raudraṃ gāvedhukh!ṃ caruṃ nirvapati te vā ete dve satī ratne ekaṃ karoti sampadaḥ kāmāya tadyadetena yajate yāṃ vā imāṃ sabhāyāṃ ghnanti rudro haitāmabhimanyate 'gnirvai rudro 'dhidevanaṃ vā agnistasyaite 'ṅgārā yadakṣāstamevaitena prīṇāti tasya ha vā eṣānumatā gṛheṣu hanyate yo vā rājasūyena yajate yo vaitadevaṃ vedaitadvā asyaikaṃ ratnaṃ yadakṣāvāpaśca govikartaśca tābhyāmevaitena sūyate tau svāvanapakramiṇau kurute tasya dvirūpo gaurdakṣiṇā śitibāhurvā śitivālo vāsirnakharo vāladāmnākṣāvapanam prabaddhametadu hi tayorbhavati

And on the following day, having brought together gavedhukâ (seeds) from the houses of the Keeper of the dice (akshâvâpa) and the Huntsman (govikartana), he prepares a gavedhukâ pap for Rudra at the house of him who is consecrated. These two, while being two jewels (of the king), he makes one for the purpose of completeness. And as to why he performs this offering,--Rudra is hankering after that (cow) which is killed here in this hall; now Rudra is Agni (fire), and the gaming-board being fire, and the dice being its coals, it is him (Rudra) he thereby pleases. And verily whosoever, that knows this thus, performs the Râgasûya, in his house that approved (cow) is killed. And he, the keeper of dice, and the huntsman, are (each of them) assuredly one of his (the king's) jewels: it is for these two that he is thereby consecrated, and these two he makes his own faithful followers. The sacrificial fee for this (jewel) is a bicoloured bullock--either one with white fore-feet, or a white-tailed one,--a claw-shaped knife, and a dice-board with a horsehair band; for that is what belongs to those two.