Rasendrapurana 31.41

Rasendrapurāṇa 31.41

bhūnāgotpattistadbhedāśca
varṣāsu vṛṣṭisaṃklinne bhūgarbhe sambhavanti hi
jantavaḥ kṛmirūpā ye te bhūnāgā iti smṛtāḥ