Hare Raama Hare Raama, Raama Raama Hare Hare
Hare Krishna Hare Krishna, Krishna Krishna Hare Hare

Love and adorations to Lord Raama and Lord Krishna

Sample No. 1
Sample No. 2

View here for the Mahaa Mrityunjaya Mantra.

Or the main menu here for the other commonly chanted mantras.