The Kena Upanishad is a Vedic Sanskrit text classified as one of the primary or Mukhya Upanishads that is embedded inside the last section of the Talavakara Brahmanam of the Samaveda. It is listed as
Kena Upanishad Verses 1 to 4 (Sanskrit, Devanagari script)
Adi Shankara, also called Adi Shankaracharya, was an Indian Vedic scholar-monk, philosopher, and teacher of Advaita Vedanta. He wrote influential commentaries on the Brahma sutras and other texts, and
Kena Upanishad
…Woodburne interprets the first khanda of Kena Upanishad to be describing Brahman in a manner that "faith" is described in Christianity. In contrast, Shankara interprets the first khanda entirely as monistic. The second khanda of Kena Upanishad starts with prose paragraph 9 that inserts a theistic theme…
Painting of Adi Shankara, exponent of Advaita Vedanta with his disciples by Raja Ravi Varma
The birthplace of Adi Shankara at Kalady
Vidyashankara temple at Sringeri Sharada Peetham, Shringeri
Adi Sankara Keerthi Sthampa Mandapam, Kalady, Kochi