Genesis 19:30
And Lot went up out of Zoar, and dwelt in the mountain, and his two daughters with him; for he feared to dwell in Zoar: and he dwelt in a cave, he and his two daughters.
Cross-reference
Genesis 19:20 is Lot's plea to flee to Zoar, but 19:30 shows him leaving it out of fear, revealing his doubt.
In 19:17-23, the angels told Lot to flee to the mountains but he bargained for Zoar. His fear-driven move to a cave shows he ended up where God originally sent him.
Genesis 13:10 shows Lot once chose the fertile plain near Sodom for its beauty. His hiding in a cave now is the painful reversal of that worldly choice.
Genesis 14:10 shows kings fleeing to the hills, similar to Lot's later escape to the mountains.
In Isaiah 15:5, Zoar is again a refuge for fugitives, echoing Lot's flight there after Sodom's destruction.
Jeremiah 48:34 includes Zoar in a prophecy of desolation, recalling its history as a place of escape.
Lot bargained for Zoar then fled to the mountains anyway — unstable, indecisive. James 1:8 warns against exactly this kind of double-minded wavering.