Narendra sings in a saturday evening satsang the mantra Jaya Radha Madhava, a kirtan for devotion of Lord Krishna, the god, who stands for bliss and joy. His purpose is to instate and reinstate the devine order on earth. To sing along you can find this mantra in the Yoga Vidya Kirtan Songbook under the number 166:
Jaya Rādhā Mādhava
Narendra ends the bhajan with the Maha Mantra, the Hare Rama, Hare Krishna. Have fun singing along.