Śrīmad-Bhāgavatam · Text 11.16.12
Who is speaking and story frame
हिरण्यगर्भो वेदानां मन्त्राणां प्रणवस्त्रिवृत् ।
अक्षराणामकारोऽस्मि पदानिच्छन्दसामहम् ॥ १२ ॥
hiraṇyagarbho vedānāṁ
mantrāṇāṁ praṇavas tri-vṛt
akṣarāṇām a-kāro ’smi
padāni cchandasām aham
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.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.
From Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.