Genesis 19:26, where Lot's wife looks back at the burning city of Sodom and turns into salt. It means a warning against looking back at past sins, a symbol of divine judgment and getting stuck in worldly attachments. Angels told Lot and his family to flee Sodom and not look back. Lot's wife turned her head to look back at the city. She immediately became a pillar of salt. Her look showed her heart stayed behind in a wicked place.