Om saha naavavatu, saha nau bhunaktu
Saha veeryam karavaavahai
Om shaanti shaanti shaanti
May the Lord protect us, may He help us to enjoy
May we work together, may our intelligence be purified
May we never hate each other
Om peace peace peace
Sample No. 1
Sample No. 2
View here for a sample of the closing mantras.
Or the main menu here for the other commonly chanted mantras.