Rudrakshajabala Upanishad
Rudrakṣajābāla Upaniṣad (Sanskrit: रुद्राक्षजाबाल उपनिषत्), also known as Rudraksha Jabala Upanishad, Rudraksha Jabalopanishad, Rudraksha Upanishad (रुद्राक्ष उपनिषत्) and Rudrakshopanishad, is one of 108 Upanishadic Hindu scriptures, written in the Sanskrit language. It is dedicated to the rudraksha, a seed used as prayer beads, regarded sacred to the god Shiva.
Source: Wikipedia — Rudrakshajabala Upanishad (CC BY-SA 4.0)