Kabbalah Library
Zohar for All, Volume 3
But His Wife Looked Back
287) “But his wife looked back,” behind Lot. The saboteur was walking behind him. Wherever Lot went, the saboteur avoided sabotaging. And the place from which he went and left behind, the saboteur would overturn.
288) This is why the saboteur told him, “Look not behind you,” for I will be sabotaging behind you, and this is why it is written, “But his wife looked back from behind him.” Seeing the saboteur, she became a pillar of salt because as long as the saboteur does not see the face of a person, he does not sabotage it, but since Lot’s wife turned her face back to look behind him, she promptly became a pillar of salt.