Śatapatha Brāhmaṇa ("of a hundred paths") 3.5.4.2

3.5.4.2

devāśca vā asurāśca | ubhaye prājāpatyāḥ paspṛdhire tato 'surā eṣu lokeṣu kṛtyāṃ valagānnicakhnurutaivaṃ ciddevānabhibhavemeti

Now the gods and the Asuras, both of them sprung from Pragâpati, were contending. The Asuras then by way of witchcraft buried charms within these worlds, thinking, 'Peradventure we may thus overcome the gods.'