Shatapatha Brahmana 5.4.1.10

5.4.1.10

tatsīsenāpajaghāna | tasmātsīsam mṛdu sṛtajavaṃ hi sarveṇa hi vīryeṇāpajaghāna tasmāddhiraṇyarūpaṃ sanna kiyaccanārhati sṛtajavaṃ hi sarveṇa hi vīryeṇāpajaghāna tadvai sa tannāṣṭrā rakṣāṃsyapajaghāna tatho evaiṣa etannāṣṭrā rakṣāṃsyato 'pahanti

He beat it off with (a disk of) lead: hence lead is soft, for it has lost its spring, as it beat off (the goblin) with all its might. Hence also, while being like gold, it is not worth anything; for it has lost its spring, as it beat off (the goblin) with all its might. And so, indeed, he (Indra) thereby beat off the fiends, the Rakshas; and in like manner this one (the king) thereby beats off the fiends, the Rakshas.