Genesis 19:26

His wife looked back from behind him. — In Oriental countries it is still the rule for the wife to walk behind her husband. As regards the method of her transformation, some think that she was stifled by sulphureous vapours, and her body subsequently encrusted with salt. More probably, the earthquake heaped up a mighty mass of the rock-salt, which lies in solid strata round the Dead Sea, and Lot’s wife was entangled in the convulsion and perished, leaving the hill of salt, in which she was enclosed, as her memorial. Salt cones are not uncommon in this neighbourhood, and the American Expedition found one, about forty feet high, near Usdum (Lynch, Report, pp. 183 et seq.). Entombed in this salt pillar, she became a “monument of an unbelieving soul” (Wis. 10:7).