This is mantra of Lord Krishna. In this mantra various names of Lord Krishna are recited to worship the God Krishna Who is the avaatar of God Vishnu.
Shri Keshvay namah, Naraynay namah, Madhvay namah ,
Govinday namah, Vishnve namah, Madhusudnay namah,
Trivikramay namah, Vamnay namah, Shridhray namah,
Hrshikeshay namah, Padhanabhay namah, Damodaray namah,
Sankrshnay namah, Vasudevay namah, Prdyumnay namah,
Aniruddhay namah, Purushottmay namah, Adhoxjay namah,
Narsinhay namah, Achyutay namah, Janardnay namah,
Upendray namah, Haraye namah, Shri Krishnay namah ||