Shanthi mantra from Svetasvatara upanishad.

Ya yakogvarno bhaudha shakthiyoga,
dwarni nakaninhitarth thadathi, vichaothi chanthe vishwamadho sa deva ,
sano bhudcha shubya sayunkathu||

Thadeva ghinsadadi thyasath dvayu sthadhu chandrama ,
thadeva shukran thadu Brahma thadha pasath Prajapathi||

Tvam sthri Tvam pumanasi,
Tvam kumar uthva kumari,
tvam jeerno dhanden vanchasi,
tvam jatho bhavasi vishwatho mukhaha||

Neelha pathango harito lohithaksha|
Sathidhagarbh Ruthva samudra |
Annadhimathvam vibhutven varthse,
yatho jaathani bhuvani Vishwa||


Meaning:
Who, one without hue ,by his own powers created many hues for some hidden purpose which at the end withdraws into himself the entire universe!
May he bless us with good intellect!

That Deva or Supreme being is fire,
that deva is the sun,
that deva is the air,
that deva is also the moon,
that deva is the Brahman,
that deva is the water,
that deva is the Prajapathi!

You are the woman ,
You are the man,
You are the youth and the maiden too,
You are the old man that totters along leaning on a staff,
You are facing all directions appearing in the cosmic form!

You are the dark blue butterfly and the green parrot with red eyes,
You are the thunder cloud , the seasons and the oceans,
You are without a beginning and is all pervading
from You alone all the worlds are born!

The great seer , lord of all endow us with good thoughts!