Śatapatha Brāhmaṇa ("of a hundred paths") 7.4.2.12

7.4.2.12

so 'bravīt | ayaṃ vāva mādhūrvīditi yadabravīdadhūrvīnmeti tasmāddhūrvā dhūrvā ha vai tāṃ dūrvetyācakṣate paro 'kṣam paro 'kṣakāmā hi devāstadetatkṣatram prāṇo hyeṣa raso lomānyanyā oṣadhaya etāmupadadhatsarvā oṣadhīrupadadhāti

He said, 'Verily, this (vital air) has undone me!' and because he said, 'it has undone (dhûrv) me,' hence (the name) 'dhûrvâ;' 'dhûrvâ' doubtless being what is mystically called 'dûrvâ,' for the gods love the mystic. That (dûrvâ grass) is the ruling power (Kshatra), for it is this vital sap, the breath; and the other plants are the hair: in laying down that (dûrvâ plant) he lays down all (kinds of) plants.