Chandogya Upanishad (with commentary) · Chapter 2.11

ChUpBh_2,10.6 uktasyaiva piṇḍitārthamāha-ekaviṃśatisaṃkhyayā'dityasya jayamāpnoti paro hāsyaivaṃvida ādityajayānmṛtyugocarātparo jayo bhavati dvāviṃśatyakṣarasaṃkhyayetyarthaḥ /
ya etadevaṃ dvānitikyādyuktārtham /
tasyaitadyathoktaṃ phalamiti dvirabhyāsaḥ sāptavidhyasamāptyarthaḥ //6//
iti chāndogyopaniṣadi dvitīyādhyāyasya daśamaḥ khaṇḍaḥ
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START ChUp 2,11.1
mano hiṅkāraḥ |
vāk prastāvaḥ |
cakṣur udgīthaḥ |
śrotraṃ pratihāraḥ |
prāṇo nidhanam |
etad gāyatraṃ prāṇeṣu protam

ChUpBh_2,11.1 vinā nāmagrahaṇaṃ pañcavidhasya saptavidhasya ca sāmna upāsanamuktam /
athedānīṃ gāyatrādināmagrahaṇapūrvakaṃ viśiṣṭaphalāni sāmopāsanāntarāṇyucyante yathākramaṃ gāyatrādīnāṃ karmaṇi prayogastathaiva /
mano hiṅkāro manasaḥ sarvakaraṇapravṛttīnāṃ prāthamyāt /
tadānantaryādvākprastāvaścakṣurudgīthaḥ śraiṣṭhyāt /
śrotraṃ pratihāraḥ pratihṛtatvāt /
prāṇo nidhanaṃ yathoktānāṃ prāṇe nidhanātsvāpakāle /
etadgāyatraṃ sāma prāṇeṣu protam /
gāyatryāḥ prāṇasaṃstutatvāt //1 //
START ChUp 2,11.2
sa ya evam etad gāyatraṃ prāṇeṣu protaṃ veda |
prāṇī bhavati |
sarvam āyur eti |
jyog jīvati |
mahān prajayā paśubhir bhavati |
mahān kīrtyā |
mahāmanāḥ syāt |
tad vratam