Atharvaveda 8.3.3

8.3.3

ubhóbhayāvinn úpa dhehi dáṃṣṭrau hiṃsráḥ śíśānó 'varaṃ páraṃ ca |
utā́ntárikṣe pári yāhy agne jámbhaiḥ sáṃ dhehy abhí yātudhā́nān ||3||

Apply both thy tusks, thou that hast them in both jaws (ubhayāvín), the lower one and the upper, being harmful, sharpened; also in the atmosphere go about, O Agni; put together thy grinders upon the sorcerers.