Rigveda 1.164.29
अ॒यं स शि॑ङ्क्ते॒ येन॒ गौर॒भीवृ॑ता॒ मिमा॑ति मा॒युं ध्व॒सना॒वधि॑ श्रि॒ता ।सा चि॒त्तिभि॒र्नि हि च॒कार॒ मर्त्यं॑ वि॒द्युद् भव॑न्ती॒ प्रति॑ व॒व्रिमौ॑हत॥
ayaṃ sa śiṅkte yena gaurabhīvṛtā mimāti māyuṃ dhvasanāvadhi śritā |sā cittibhirni hi cakāra martyaṃ vidyud bhavantī prati vavrimauhata ||
Our plain-language meaning of this verse is waiting for scholar review.