Bhagavad Gita Chapter 10, Text 25

Bg 10.25

maharsinam bhrgur aham
giram asmy ekam aksaram
yajnanam japa-yajno ’smi
sthavaranam himalayah

Word for word: 
maha-rsinam — among the great sages; bhrguh — Bhrgu; aham — I am; giram — of vibrations; asmi — I am; ekam aksaram — pranava; yajnanam — of sacrifices; japa-yajnah — chanting; asmi — I am; sthavaranam — of immovable things; himalayah — the Himalayan mountains.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Of the great sages I am Bhrgu; of vibrations I am the transcendental om. Of sacrifices I am the chanting of the holy names [japa], and of immovable things I am the Himalayas.

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Brahma, the first living creature within the universe, created several sons for the propagation of various kinds of species. Among these sons, Bhrgu is the most powerful sage. Of all the transcendental vibrations, om (om-kara) represents Krishna. Of all sacrifices, the chanting of Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare is the purest representation of Krishna. Sometimes animal sacrifices are recommended, but in the sacrifice of Hare Krishna, Hare Krishna, there is no question of violence. It is the simplest and the purest. Whatever is sublime in the worlds is a representation of Krishna. Therefore the Himalayas, the greatest mountains in the world, also represent Him. The mountain named Meru was mentioned in a previous verse, but Meru is sometimes movable, whereas the Himalayas are never movable. Thus the Himalayas are greater than Meru.