C. F. Keil and Franz Delitzsch on Genesis 14:8-12

Gen 14:8-12

After conquering all these tribes to the east and west of the Arabah, they gave battle to the kings of the Pentapolis in the vale of Siddim, and put them to flight. The kings of Sodom and Gomorrah fell there, the valley being full of asphalt-pits, and the ground therefore unfavourable for flight; but the others escaped to the mountains (הרה for ההרה), that is, to the Moabitish highlands with their numerous defiles. The conquerors thereupon plundered the cities of Sodom and Gomorrah, and carried off Lot, who dwelt in Sodom, and all his possessions, along with the rest of the captives, probably taking the route through the valley of the Jordan up to Damascus.