Verse 32. Remember Lot's wife. See Barnes "Ge 19:26".

She looked back -- she delayed -- perhaps she desired to take something with her, and God made her a monument of his displeasure. Jesus directed his disciples, when they saw the calamities coming upon the Jews, to flee to the mountains, Mt 24:16. He here charges them to be in haste -- not to look back -- no!; to delay -- but to escape quickly, and to remember that by delaying, the wife of Lot lost her life.

{w} Ge 19:26