हरे राम हरे राम राम राम हरे हरे ।
हरे कृष्ण हरे कृष्ण कृष्ण कृष्ण हरे हरे ॥

Meaning:
This is also known as the ‘Maha Mantra’. This is just a chanting of the names Ram and Krishna together with Hari which is the principle name of Vishnu whose incarnations are these.

Word meanings:
हरे = OH! hari;
राम = Lord Rama;
हरे = OH! hari;
राम = Lord Rama;
राम = Lord Rama;
राम = Lord Rama;
हरे = OH! hari;
हरे = OH! hari;
हरे = OH! hari;
कृष्ण = of Krishna; black;
हरे = OH! hari;
कृष्ण = of Krishna; black;
कृष्ण = of Krishna; black;
कृष्ण = of Krishna; black;
हरे = OH! hari;
हरे = OH! hari;