The Gayatri Mantra

Aum
Bhuh Bhuvah Svah
Tat Savitur Varenyam
Bhargo Devasya Dheemahi
Dhiyo Yo nah Prachodayat

~ The Rig Veda (10:16:3)

Translation:
"O thou existence Absolute, Creator of the three dimensions, we contemplate upon thy divine light. May He stimulate our intellect and bestow upon us true knowledge."