Brihadaranyaka Upanishad (with commentary) · Chapter 5.8

BrhUpBh_5,7.1 tathaivopāsanāntaraṃ satyasya brahmaṇo viśiṣṭaphalamārabhyate - vidyudbrahmetyāhuḥ /
vidyuto brahmaṇo nirvacanamucyate - vidānādavakhaṇḍanāttamaso medhāndhakāraṃ vidārya hyavabhāsate 'to vidyut /
evaṃ guṇaṃ vidyudbrahmeti yo vedāsai vidyatyavakhaṇḍayati vināśayati pāpmana enamātmānaṃ prati pratikūlabhūtāḥ pāpmāno ye tānsarvānpāpmano 'khaṇḍayatītyarthaḥ /
ya evaṃ veda vidyudbrahmeti tasyānurūpaṃ phalam /
vidyuddhi yasmādbrahma //1//
iti śrīmadbṛhadāraṇyakopaniṣadbhāṣye pañcamādhyāyasya saptamaṃ brāhmaṇam //7//
START BrhUp 5,8.1
vācaṃ dhenum upāsīta |
tasyāś catvāraḥ stanāḥ |
svāhākāro vaṣaṭkāro hantakāraḥ svadhākāraḥ |
tasyai dvau stanau devā upajīvanti |
svāhākāraṃ ca vaṣaṭkāraṃ ca |
hantakāraṃ manuṣyāḥ |
svadhākāraṃ pitaraḥ |
tasyāḥ prāṇa ṛṣabho mano vatsaḥ