Depict a scene from the Christian Bible, more specifically Genesis 18:1-14. Abraham is shown hosting three guests under the shade of a tree. Sarah is standing at a distance, partially hidden behind a tent. They are both expressing surprise and joy as one of the guests shares the prophecy of their future son. The attire of all characters should reflect the historical and geographical context of the story. All figures should have a naturalistic proportion and realistic facial expressions, characteristic of Renaissance art. Include relevant details such as religious symbolism and use of accurate biblical era architecture, while remaining respectful and devotional to Christianity. Please ensure no texts or words are present in the art.