असतोमा सद्गमय। तमसोमा ज्योतिर् गमया। 
मृत्योर्मामृतं गमय॥ ॐ शांति शांति शांति 
      - बृहदारण्यक उपनिषद् 1.3.28.

"Aum Asato mā sad gamaya 
Tamaso mā jyotir gamaya 
Mṛtyormā amṛtam gamaya 
Aum śānti śānti śāntiḥ "
     - (Bṛhadāraṇyaka Upaniṣad 1.3.28) 

meaning of which is -

"From ignorance, lead me to truth; 
From darkness, lead me to light; 
From death, lead me to immortality 
Aum peace, peace, peace " -