Mathuraya Param Kshetram  - Varaha Purana, Mathura Mahatama (169.1)

Mathuraya Param Kshetram - Varaha Purana, Mathura Mahatama (169.1)

Mathuraya Param Kshetram Trailokya Na Cha Vidyate.
Tasyam Vasamyahm Devi Mathurayam Cha Sarvada.

- Varaha Purana, Mathura Mahatama (169.1)
 
Lord says: Mathura [Braj Mandal] is the supreme among all the places which is nowhere found in the three worlds. O Goddess, I reside there every moment.