Dinanukt, the Half-Man Half-Book mythological character of the Mandean holy book, The Ginza Rba or “The Great Treasure”.
EDIT: Further research on this image has uncovered that the character’s identity is somewhat ambiguous, and the textual clues given in the image also point to it being a depiction of the lightworld hero Hibil Ziwa. The passages on the body are an abridged quotation from Prayer 79 of the Mandaean Prayer book:
“In the Name of the Great Life!
When the myrtle, the myrtle, flourished
In the gardens of Hibil;
When the wild marjoram grew in the precinct of the manda
They gave me two twigs of myrtle
From which they twisted a wreath for the jordan
For it is wonderful and fragrant it is perfume!”