Kali Santarana Upanishad
(Upanishad No. 103 of The Krishna Yajurveda)
 

At the end of the Dvarapa Yuga, Narada Muni approached his father, Lord Brahma and asked him, "How can I overcome the evil influences of the Kali Yuga (the Age of Quarrel and Hypocrisy)?"
Lord Brahma replied, "It is through the utterance of the names of the Purusha (the Enjoyer), Lord Narayana, that one is rid of all evil effects." He added,

"Hare Rama Hare Rama Rama Rama Hare Hare
Hare Krishna Hare Krishna Krishna Krishna Hare Hare."

The above collection of sixteen names is destructive of the baneful influences of the present dark era, the Kali Yuga. Beyond this, there is no other means to liberation in any scriptures. It is destructive also of the veil of ignorance of the jiva which is invested with the sixteen kalas beginning with prana and ending with naman when the transcendent Brahman manifests itself in all its glory, even as the radiant region of the solar disc shines forth brilliantly with the vanishing of the clouds.

Sage Narada concluded by saying, "O Lord, hearing the further eulogy and the narration of details of more benefits, it is quite appropriate that no special rule be followed in the matter of muttering this sacred name, which can be done at all times whether in a clean or even an unclean state. Salutations to thee."

OM  TAT - SAT