Om (oṃ): What the Texts Say About the One Syllable

Written and reviewed by The Kriya Yogi · Updated 19 September 2026

oṃ

The syllable itself — traditionally read as the sound of the whole.

Source: Mandukya Upanishad (entire text); Yoga Sutras 1.27–1.28
Tradition: Upanishadic and classical yoga
Traditional use: Recited alone, or prefixed to almost every other mantra.
Repetition: Often 3, 11 or 108 repetitions; also used as a single long sound.

In short

Patanjali names it: Yoga Sutras 1.27 calls Om the word of īśvara, and 1.28 prescribes repeating it with contemplation of its meaning.
The Mandukya Upanishad analyses it as three sounds — a, u, m — plus the silence that follows, mapped onto waking, dreaming, deep sleep and a fourth state.
It is a container, not a translation: no single English word renders it, which is why we do not offer one.
It has no required pitch or duration in the classical sources.

Where it comes from

Om is the most documented mantra in the Indian tradition and the only one the Yoga Sutras name outright. Yoga Sutras 1.27 states that the syllable oṃ is the word of īśvara, and 1.28 gives the practice: repeat it, and contemplate what it means. That pairing — repetition plus contemplation — is the whole instruction. Patanjali does not describe pitch, length or count.

The Mandukya Upanishad, a very short text of twelve verses, is devoted entirely to this one syllable. It analyses Om into a, u and m, aligning them with waking, dreaming and deep sleep, and then points to a fourth element: the silence into which the sound resolves. That silence is treated as the important part.

How it is used

In practice Om appears three ways. Alone, as a long single sound repeated a few times at the start and end of practice. As a prefix, attached to almost every other mantra in this library. And as an object of concentration in the sense of Sutra 1.28, where the repetition is slow and the attention is on meaning rather than on sound.

A practical note on pronunciation: in careful recitation it is closer to a long o moving into a hummed m, with the humming given real length. Written "aum" and "om" are the same syllable — the first spelling shows the analysis, the second shows the sound.

A 108-bead mala is the traditional counting tool; see how to use a mala for japa.

What we are not saying

You will find claims that Om is the frequency of the earth, or that chanting it at a specific hertz produces specific effects. Those claims are modern and are not in the sources above, and we do not make them. What the texts claim is narrower and more interesting: that this syllable is worth repeating with attention.

Questions & answers

+ Is Om religious?

It appears across Hindu, Buddhist and Jain practice, so it is not the property of one religion — but it is a sacred syllable, not a neutral sound. If that matters to you, practise something else; nothing in yoga requires it.

+ Should I chant Om out loud or silently?

Both are traditional. Aloud gives the mind something obvious to hold; silently is harder and is generally regarded as the deeper practice. Most people start aloud.

+ Does Om have to be chanted 108 times?

No. 108 is a traditional count for japa on a mala, not a requirement. Three slow repetitions with real attention is a legitimate practice.

Mantra recitation is a contemplative practice, not a treatment for any condition. Nothing here should be read as medical advice.