Avadhuta Gita

All that exists in this world of forms

Is nothing but the Self, and the Self alone.

How, then, shall the Infinite worship Itself?

Shiva is one undivided Whole!

-Avadhuta Gita (The Song of the Renunciant)

Probably 9th or 10th century

Traditionally ascribed to Shri Dattatreya