When he was about to pass, the Sphinx jumped in front of him.

Suddenly, the Sphinx raised its head.

The Sphinx began to walk around him.

The Sphinx had eaten hundreds of people on their way to the city of Thebes, because they could not answer the riddle the cunning Sphinx had asked them.

This terrible monster was the Sphinx.

"I will let you pass safely," the Sphinx said, "if you can answer my riddle."