Ringtone of the Gayatri Mantra for mobile phones.
om bhur bhuvah svah tat savitur varenyam bhargo devasya dhimahi dhiyo yo nah prachodayat.
The Gayatri Mantra is a highly revered mantra, based on a Vedic Sanskrit verse from a hymn of the Rigveda (3.62.10), attributed to the rishi (sage) Vishwamitra. The mantra is named for its vedic gayatri meter. As the verse can be interpreted to invoke the deva Savitri, it is often called Savitri. Its recitation is traditionally preceded by "om" and the formula bhur bhuvah svah, known as the mahavyahriti ("great utterance").
The Gayatri Mantra is repeated and cited very widely in vedic literature, and praised in several well-known classical Hindu texts such as Manusmriti, Harivamsa, and the Bhagavad Gita. The mantra is an important part of the upanayanam ceremony for young males in Hinduism, and has long been recited by Brahmin males as part of their daily rituals. Modern Hindu reform movements spread the practice of the mantra to include women and all castes and its use is now very widespread.