The prophet Lot and his wife lived in Sodom, an abode of wickedness and an affront to God. She is presumably the mother of Moab's mother and Ben-ammi's mother. When God decided to destroy Sodom and Gomorrah for their wickedness, God sent His angels to Lot in order to save Lot and his family form sharing the same fate as the rest of Sodom's inhabitants.
The angels told Lot and his family to not look back.
Escape for your life! Do not look behind you, or stop anywhere in the entire valley; escape to the mountains [of Moab], or you will be consumed and swept away.— Genesis 19:17 (AMP)
Lot and his family managed to escape to the small town of Zoar, which God decided to spare, but Lot's wife looked back upon Sodom and was transformed into a pillar of salt. The Qur'an states, explicitly, that Lot's wife was a wicked person who was not meant to be saved.
God has struck a similitude for the unbelievers -- the wife of Noah, and the wife of Lot; for they were under two of Our righteous servants, but they betrayed them, so they availed them nothing whatsoever against God; so it was said,Enter, you two, the Fire with those who enter.— Surah 66:10 (Arberry)
- Surah 66:10
- Surah 7:83
- Surah 11:81
- Surah 15:58–59
- Surah 26:170–171
- Surah 27:57
- Surah 29:32
- Surah 29:32–33
- Surah 37:134–135