Śatapatha Brāhmaṇa ("of a hundred paths") 9.1.1.15

9.1.1.15

sa eṣa kṣatraṃ devaḥ | yaḥ sa śataśīrṣā samabhavadviśa ima itare ye vipruṅbhyaḥ samabhavaṃstasmā etasmai kṣatrāyaitā viśa etam purastāduddhāramudaharanya eṣa prathamo 'nuvākastenainamaprīṇaṃstathaivāsmā ayametam purastāduddhāramuddharati tenainam prīṇāti tasmādeṣa ekadevatyo bhavati raudra etaṃ hyetena prīṇāti

That god who became the hundred-headed (Rudra) is the chief (kshatra), and those others who originated from the drops are the peasants (clansmen): those peasants in the first place assigned to that chief this as his special share, to wit, this first chapter of formulas, and gratified him thereby. And in like manner does this (Sacrificer) now assign this to him as his special fore-share, and gratify him thereby. Hence this (section) is addressed to a single deity, to Rudra; for it is him he thereby gratifies.