Vayupurana 1.58.110

Vāyupurāṇa 1.58.110

yathā dāvapradagdheṣu tṛṇeṣviha tape ṛtau .
navānāṃ prathamaṃ dṛṣṭasteṣāṃ mūle tu sambhavaḥ .. 58.109 ..