What is the scriptural source of the dhyana sloka of Padmanabha Swami as shown in the enclosed image?
Why is Shiva shown in Linga Form and not in His original form while all other deities are in their original form?
Please note that I am not interested in any local stories.
The Question and the answer of Is the Padmanabhaswamy idol at Trivandrum represented as worshipping Siva linga? does NOT throw any light on what I want to know. Moreover the site referred to writes that 33 crores of gods and demigods are present in the temple, whereas hinduism has only 33 types of God! I want the reference to the dhyana mantra of the deity and not wild imaginations.