Yāska's Nirukta 2.p9

2.p9

vidyuttaḍid bhavatīti śāstrapūṇiḥ | tathā lokaprasiddheḥ | tatrāpi vadhakarmatvamevorarīkṛtya pravṛtta iti darśayati-sā hyavatāḍayati janasya cakṣūṃṣi, yasya copari nipatati hanti ca| dūrācca dadṛśa iti antikanāmatvābhāvaṃ darśayati | apitvidamityādi,apiḥ sambhāvanāyām tuśabdo vadhakarmapakṣāt pakṣāntaraṃ darśayitum, idamiti buddhyādhikaraṇavakṣyamāṇamantraviṣayam, taḍinnīma padānudeśārtham, evaśabdo'vadhāraṇe, abhipretamiti nirvicikitsāvacanam| dūre