From The Midrash Says:
Both Rafael and Gavriel took Lot's hand and that of his wife and his two righteous daughters and pulled them away from the city.
Lot left penniless. This was his punishment for having settled in S'dom for material reasons.
"Escape for your life!" the angels warned Lot and his family "Be happy that your life is spared and forget about your money! Do not look back because Hashem's shechina will descend upon the city!"