The Chandogya Upanishad is embedded in the Chandogya Brahmana of the Sama Veda of Hinduism. It is one of the oldest Upanishads.  The Upanishad belongs to the Tandya school of the Samaveda. The Chandogya Upanishad is notable for its lilting metric structure, its mention of ancient cultural elements such as musical instruments, and embedded philosophical premises that later served as the foundation for the Vedanta school of Hinduism. It is one of the most cited texts in later Bhasyas (reviews and commentaries) by scholars from the diverse schools of Hinduism. Adi Shankara, for example, cited Chandogya Upanishad  810 times in his Vedanta Sutra Bhasya, more than any other ancient text. The name of the Upanishad is derived from the word Chanda, which means “poetic meter,  prosody”. The name implies that the nature of the text relates to the patterns of structure, stress, rhythm, and intonation in language, songs, and chants.