If it's an older book, you might be thinking of Hunters of the Red Moon (1973) by Marion Zimmer Bradley and Paul Edwin Zimmer.
Dane Marsh is sailing solo around the world when he is kidnapped from the middle of the Pacific ocean by a ship of Mekhar ("proto-feline") slavers. Dane first meets a couple of Mekhar when he awakes after surgery to have a translator disk implanted, which seems similar to "medically process him." He is put in a cage with some human-appearing ("proto-simian") people and a large reptilian (proto-reptilian) being named Aratak who becomes Dane's ally. The woman he first meets, Rianna and Aratak survive with Dane to the end of the story.
Aratak believes in "the Divine Egg" as a source of wisdom:
he tended to fill every lull in the conversation with some excerpt from the Wisdom of the Divine Egg—who had been, Dane gradually gathered, the Confucius, Lao-Tzu, Hillel, and Hiawatha of his race.
The Mekhar sell Dane, Rianna, Aratak, another prisoner, and empath named Dallith who becomes bonded with Dane, and a dishonoured Mekhar named Cliff-Climber to the unknown Hunters to be hunted for sport:
"Prisoners," he said quietly. "Your chance of escape, or honorable death, is upon you. You have proven that you are too brave, too courageous, to be sold as slaves; it is, therefore, our honor and our pleasure to provide you this alternative. Do not be afraid. You are about to be given a small dose of a mild anesthetic gas, which will have no lasting side effects, so that you need not be harmed by struggling in the transit to the Hunters' World. Let me congratulate you, and wish you all an honorable escape, or a bloody and honorable death."
They win a great reward of riches, but Aratak and Dane mostly value their freedom:
"Riches," she murmured," enough to start a scientific foundation-maybe to come back here and explore the old city and find out about the old race that saved my life-"
Aratak said quietly, "The Divine Egg has seen fit to preserve my Me; he must have work for me somewhere in the Unity. But before I go and do it, I will journey to Spica Four and tell Dallith's people how she died—and Cliff-Climber's. I have no other use for wealth."