The word mantra has two parts: man, which is the root of the Sanskrit word for mind; and tra, which is the root of the word instrument. A mantra is therefore an instrument of the mind, a powerful sound or vibration that you can use to enter a deep state of meditation.

Mantra:
Om Om Om,
Sarvesham Svastir Bhavatu,
Sarvesham Shantir Bhavatu,
Sarvesham Poornam Bhavatu,
Sarvesham Mangalam Bhavatu,
Om, Shanti, Shanti, Shanti.

This mantra like many of the other Hindu Shanti (peace) mantras sends positive vibrations to all who come into contact with them. I hope we can all work together for the benefit of all living beings to make the world a better place.

Source is HERE