Prayer for Universal Peace : Om Shanti Shanti Shantih

oṃ śaṃ no mitraḥ śaṃ varuṇaḥ |
śaṃ no bhavatvaryamā |
śaṃ na indro brihaspatiḥ |
śaṃ no viṣṇururukramaḥ |
namo brahmaṇe |
namaste vāyo |
tvameva pratyakṣaṃ bhrahmāsi |
tvāmeva pratyakṣam brahma vadiṣyāmi |
ṝtaṃ vadiṣyāmi |
satyaṃ vadiṣyāmi |
tanmāmavatu |
tadvaktāramavatu |
avatu mām |
avatu vaktāram |
oṃ śāntiḥ śāntiḥ śāntiḥ ||

Meaning :
Om May Mitra be blissful to us. May Varuna be blissful to us.
May Aryaman be blissful to us.
May Indra and Brihaspati be blissful to us.
May Vishnu, of long strides, be blissful to us.
Salutation to Brahman.
Salutation to you, O Vayu.
You, indeed, are the immediate Brahman. You alone I shall call the direct Brahman.
I shall call you righteousness. I shall call you truth.
May He protect me.
May He protect the reciter
May He protect me.
May He protect the reciter.
Om, peace, peace, peace !

(Shanti Mantra from Taittiriya Upanishad)