Bhagavad Gita Chapter 10, Verse 25
महर्षीणां भृगुरहं गिरामस्म्येकमक्षरम् | यज्ञानां जपयज्ञोऽस्मि स्थावराणां हिमालयः ||
maharṣīṇāṁ bhṛgur ahaṁ girām asmy ekam akṣaram yajñānāṁ japa-yajño 'smi sthāvarāṇāṁ himālayaḥ
Among great sages, I am Bhrigu; among words, I am the single syllable 'Om'; among sacrifices, I am the sacrifice of silent repetition; among immovable things, I am the Himalayas.
Krishna continues enumerating manifestations in sages, words, sacrifices, and nature. 'Maharṣīṇāṁ bhṛgur ahaṁ'—among great sages, I am Bhrigu, one of the seven great sages. 'Girām asmy ekam akṣaram'—among words, I am the single syllable 'Om'. Om is the primordial sound, the essence of all mantras. 'Yajñānāṁ japa-yajño 'smi'—among sacrifices, I am the sacrifice of silent repetition (japa). Japa is the internal, silent repetition of the divine name. 'Sthāvarāṇāṁ himālayaḥ'—among immovable things, I am the Himalayas. This verse shows Krishna as the best in wisdom (Bhrigu), sound (Om), practice (japa), and stability (Himalayas). Each represents the source manifesting as the essence or highest form.