The Kaushitaki Upanishad (Sanskrit: कौषीतकि उपनिषद्, Kauṣītāki Upaniṣad) is one of the earlier, "primary" Upanishads, belonging to the Kaushitaki shakha of the Rigveda. It is a Sāmānya Upanishad. It figures as number 25 in the Muktika canon of 108 Upanishads.
Read more about Kaushitaki Upanishad: Overview