Sanskrit invocation - Brihadaranyaka Upanishad 1.3.28.

ॐ असतोमा सदगमय ;
तमसोमा ज्योतिरगमय;
म्र्त्योर्मा अमृतं गमय;
ॐ शान्तिः शान्तिः शान्तिहि|


English pronunciation of the above verse in Sanskrit:

Om Asato maa sad-gamaya;
tamaso maa jyotir-ga-maya;
mrtyor-maa amrutam gamaya;
Om Shaantih Shaantih Shaantihi.

English translation(obviously not perfect):

O Lord Lead me from the unreal to the real.
Lead me from the darkness to light.
Lead me from death to immortality.
May there be peace, peace, and perfect(final) peace.