Generate an image representing Lehi, the Book of Mormon prophet, around 600 BC. He is kneeling in the desert, in a moment of prayer. Dress him in clothing characteristic of wealthy people of Jerusalem's time, reflecting the style of dress and social status of that civilization's elite. Lehi, around 70 years old, has a long white beard, similar to that of the rabbis of the time. Capture the seriousness and devotion of this moment of prayer. In the scenario, include a towering rock with a pillar of fire on it, before which Lehi is visibly frightened. Highlight elements that convey the historical authenticity and religious importance of this divine encounter.