Shatapatha Brahmana 5.1.1.1

5.1.1.1

devāśca vā asurāśca | ubhaye prājāpatyāḥ paspṛdhire tato 'surā atimānenaiva kasminnu vayaṃ juhuyāmeti sveṣvevāsyeṣu juhvataśceruste 'timānenaiva parābabhūvustasmānnātimanyeta parābhavasya haitanmukhaṃ yadatimānaḥ

Once upon a time the gods and the Asuras, both of them sprung from Pragâpati, strove together. And the Asuras, even through arrogance, thinking, 'Unto whom, forsooth, should we make offering?' went on offering into their own mouths. They came to naught, even through arrogance: wherefore let no one be arrogant, for verily arrogance is the cause of ruin.