A scene depicting Genesis 21:1-3 through the lens of christianity. The image should take inspiration from pre-1912 religious artwork, reflecting serenity and devotion. The artwork should not include any text or words but should be subtle in its symbolism. It should be designed in a digital medium, keeping in mind the story line where Sarah joyously holding her newborn son Isaac, and Abraham embracing and looking at them fondly. The overall composition should be respectful and devotional.