Śrīmad-Bhāgavatam 11.16.12
హిరణ్యగర్భో వేదానాం మన్త్రాణాం ప్రణవస్త్రివృత్ ।
అక్షరాణామకారోఽస్మి పదానిచ్ఛన్దసామహమ్ ॥ ౧౨ ॥
hiraṇyagarbho vedānāṁ
[hiranyagarbho vedaanaam]
mantrāṇāṁ praṇavas tri-vṛt
[mantraanaam pranavas tri-vrit]
akṣarāṇām a-kāro ’smi
[aksharaanaam a-kaaro ’smi]
padāni cchandasām aham
[padaani chchandasaam aham]
Word-for-word
hiraṇya-garbhaḥ
—
Lord Brahmā
vedānām
—
of the Vedas
mantrāṇām
—
of mantras
praṇavaḥ
—
the oṁkāra
tri-vṛt
—
consisting of three letters
akṣarāṇām
—
of letters
a-kāraḥ
—
the first letter, a
asmi
—
I am
padāni
—
the three-line Gāyatrī mantra
chandasām
—
among sacred meters
aham
—
I am.
Blended reading (Sanskrit + English inline)
hiraṇyagarbho vedānāṁ
hiraṇya-garbhaḥ
Lord Brahmā
vedānām
of the Vedas
mantrāṇāṁ praṇavas tri-vṛt
mantrāṇām
of mantras
praṇavaḥ
the oṁkāra
tri-vṛt
consisting of three letters
akṣarāṇām a-kāro ’smi
akṣarāṇām
of letters
a-kāraḥ
the first letter, a
padāni cchandasām aham
asmi
I am
padāni
the three-line Gāyatrī mantra
chandasām
among sacred meters
aham
I am.
Among the Vedas I am their original teacher, Lord Brahmā, and of all mantras I am the three-lettered oṁkāra. Among letters I am the first letter, “a,” and among sacred meters I am the Gāyatrī mantra.
Gauḍīya Ācāryas
Viśvanātha Cakravartī Ṭhākura
Gauḍīya
Translation
Among the teachers of the Vedas, I am their original teacher, Brahmā, and of all mantras I am the three-lettered oṁkāra. Among letters I am the first letter, “a,” and among sacred meters I am the Gāyatrī meter.
Among the teachers of the Vedas (vedānām), I am Brahmā. Padāni means the Gāyatrī meter, with three padas of eight syllables each.
My note
Source: vedabase.io