Śatapatha Brāhmaṇa ("of a hundred paths") 5.2.4.18

5.2.4.18

sa yadi pālāśaḥ sruvo bhavati | brahma vai palāśo brahmaṇaivaitannāṣṭrā rakṣāṃsi hanti yadyu vaikaṅkato vajro va vikaṅkato vajreṇaivaitannāṣṭrā rakṣāṃsi hanti rakṣasāṃ tvā badhāyeti tannāṣṭrā rakṣāṃsi hanti

If the dipping-spoon is of palâsa wood,--the palâsa being the Brahman--it is with the Brahman that he slays the fiends, the Rakshas; and if it is of vikaṅkata wood,--the vikaṅkata being the thunderbolt--it is with the thunderbolt that the slays the fiends, the Rakshas: 'For the slaughter of the Rakshas (I take) thee!' therewith he slays the fiends, the Rakshas.