"Om Namo Bhagavate Vasudevaya" is a Mantra of Krishna.
Om Namo Bhagavate Vasudevaya (listen (help·info)) (in devanagari: ॐ नमो भगवते वासुदेवाय) is a Hindumantra. ‘Om Namo Bhagavate Vasudevaya’ is a mantra of Vishnu and Krishna both. It has two traditions---Tantric and Puranic. In Tantrik Tradition, the Rishi of the Mantra is Prajapati, in Puranic Tradition the Rishi is Narada. Both, however, say it is the Supreme Vishnu Mantra. Sharada Tilak Tantram, for example, says "Dvadasharno mahamantrah pradhano Vaishnavagame"—the twelve lettered mantra is the chief among vaishnava mantras. Similarly, this is the ultimate mantra in ShrimadBhagavatam, whose 12 Chapters are taken as extensions of the 12 Letters of this Mantra.,. This twelve syllable mantra is known as a Mukti (liberation) mantra and a spiritual formula for attaining freedom. This can be chanted like Gayatri Mantra. This is the principal mantra of the Vedic scripture "Srimad Bhagavatam". This mantra can also be found in Vishnu Purana.