Chandogya Upanishad (with commentary) · Chapter 2.12

ChUpBh_2,11.2 sa ya evametadgāyatraṃ prāṇeṣu protaṃ veda prāṇī bhavati /
avikalakaraṇo bhavatītyetat /
sarvamāyureti /
śataṃ varṣaṇi sarvamāyuḥ puruṣasyeti śruteḥ /
jyogujjvalaṃ jīvati /
mahānbhavati prajādibhirmahāṃśca kīrtyā /
gāyatropāsakasyaitadvrataṃ bhavati yanmahāmanāstvakṣudracittaḥ syādityarthaḥ //2//
iti chāndogyopaniṣadi dvitīyādhyāyasyaikādaśaḥ khaṇḍaḥ
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START ChUp 2,12.1
abhimanthati sa hiṅkāraḥ |
dhūmo jāyate sa prastāvaḥ |
jvalati sa udgīthaḥ |
aṅgārā bhavanti sa pratihāraḥ |
upaśāmyati tan nidhanam |
saṃśāmyati tan nidhanam |
etad rathaṃtaram agnau protam

ChUpBh_2,12.1 abhimanthati sa hiṅkāraḥ prāthamyāt /
agnerdhūmo jāyate sa prastāva ānantaryāt /
jvalati sa udgītho haviḥ sambandhācchraiṣṭhyaṃ jvalanasya /
aṅgārā bhavanti sa pratihāro 'ṅgārāṇāṃ pratihṛtatvāt /
upaśamaḥ sāvaśeṣatvādagneḥ /
saṃśamo niḥśeṣopaśamaḥ samāptisāmānyānnidhanametadrathantara magnau protam /
manthane hyagnergīyate //1 //
START ChUp 2,12.2
sa ya evam etad rathaṃtaram agnau protaṃ veda |
brahmavarcasy: annādo bhavati |
sarvam āyur eti |
jyog jīvati |
mahān prajayā paśubhir bhavati |
mahān kīrtyā |
na pratyaṅṅ agnim ācāmen na niṣṭhīvet |
tad vratam