It is from this association with healing that Sobek was considered a protective and fertile deity. His ferocity was able to ward off evil and, at the same time, defend the innocent. He was thus made a subject of personal piety and a common recipient of votive offerings, particularly in later periods of ancient Egyptian history. It was not uncommon, particularly in Ptolemaic and Roman Egypt, for crocodiles to be preserved as mummies for presentation at Sobek's cult centers. Sobek was also offered mummified crocodile eggs, intended to emphasize the cyclical nature of his solar attributes as Sobek-Ra. Likewise, crocodiles were created for religious reasons as living incarnations of Sobek.
After their deaths, they were mummified in a grand ritual display as sacred but earthly manifestations of their patron god. This practice was performed specifically in the main temple of Crocodilópolis. These mummified crocodiles were found with baby crocodiles in their mouths and on their backs. The crocodile is one of the few reptiles seen to diligently care for its young, and often transports its young this way. The practice of preserving this aspect of the animal's behavior through mummification is likely intended to emphasize the protective and nurturing aspects of the fierce Sobek, as it protects the Egyptian people in the same way that the crocodile protects its young.
In Ptolemaic and Roman Egypt, a local monograph called the Book of Faiyum centered on Sobek, with a considerable portion devoted to the journey made by Sobek-Ra each day as the sun moved across the sky. The text also focuses heavily on Sobek's central role in creation as a manifestation of Ra, as he is said to have sprung from the primeval waters of Lake Moeris, not unlike Ogdoad in the traditional creation myth of Hermopolis.
There are many varying copies of the book and many scholars think it was produced in large quantities as a "best seller" in antiquity. The integral relationship between the Faiyum and Sobek is highlighted throughout this text, and their far-reaching influence is also seen in localities outside the Faiyum; a part of the book is copied in the Temple of Upper Egypt (meaning southern Egypt) of Kom Ombo.