Tripura Upanishad - Atharva Veda
Tripura Upanishad in English rhyme
The Tripura Upanishad a minor Shakta does be,
Means "three cities”, refers to Tantric idea clearly,
That everything of triadic form and the function be,
An ancient Tantra Upanishad written in times hoary,
It explains the structure of and meditation actually,
On the Sri Chakra and the Sri Yantra specifically,
It a diagrammatic representation of universe be,
The forms of universal energy and the Devi Shakti.