فَأَنجَيْنَاهُ وَأَهْلَهُ إِلَّا امْرَأَتَهُ كَانَتْ مِنَ الْغَابِرِينَ (83)
(7:83) Then We delivered Lot and his household save his wife who stayed behind, *66
*66). As the Qur'an mentions elsewhere, Lot's wife supported her disbelieving relatives to the last.* Hence, when God directed Lot and his followers to migrate from that corrupt land, He ordained that Lot's wife be left behind.
*This seems to be an inference from al- Tahrim 66: 10 - Ed.