The answer is: Pillar of fire

Exo 13:21

As the Israelites journeyed through the wilderness, a pillar of fire served as their nighttime compass. This divine guidance was about more than mere illumination; it was a profound sign of God’s presence among His people. Imagine navigating a vast expanse of darkness when you're in an unfamiliar and unforgiving environment! This pillar not only provided physical light but also assurance and hope in desperate moments.

Think, too, about what the fire signifies beyond guidance. Fire often represents transformation and judgment in biblical texts. Yet here, it exemplifies protection and warmth, showing that even in isolation, the Israelites had a beacon of divine companionship. It parallels the joy we find in any burning passion or motivation that lights our way, guiding us through our personal deserts.

Yet there’s rich symbolism through history as well. The concept of light piercing darkness recurs throughout the Scriptures; consider the sacred flame within the Tabernacle or the transformative experience of Pentecost when the Holy Spirit appeared as tongues of fire above the apostles. These imgagery not only ties ancient contexts together but shows a continued interplay between divine presence and human experience.

This nighttime phenomenon certainly stands out in biblical lore and invokes a deep understanding that, even amidst trials, guidance often shines brightly to enlighten the path ahead.