Job's wife is one of THE FOOLISH.

JOB 2:[9] Then said his wife unto him, Dost thou still retain thine integrity? curse God, and die.

Job's wife speaks as one of the FOOLISH WOMEN speak. She wants Job to curse God for the EVIL (=Calamity/tribulation) he is going thru and then die.

The FOOLISH have no OIL in their lamps. The OIL is Truth from the Holy Spirit.

MATTHEW 25:[3] They that were FOOLISH took their lamps, and took no oil with them:

SONG OF MOSES:
DEUTERONOMY 32:[6] Do ye thus requite the LORD, O FOOLISH people and unwise? is not he thy father that hath bought thee? hath he not made thee, and established thee?

Job knows there is a season that all will go thru EVIL. This word EVIL in the Hebrew manuscript is CALAMITY/TRIBULATION. But Job wife is FOOLISH and don't know this hence she wants job to curse God for the EVIL (Calamity)

AMOS 9:[10] All the sinners of my people shall die by the sword, which say, The EVIL shall not overtake nor prevent us.

Job wife listened to those preachers that said ye will have PEACE when the word says, "Ye shall have Tribulation".

MICAH 3:[5] Thus saith the LORD concerning the prophets that make my people err, that bite with their teeth, and cry, Peace; and he that putteth not into their mouths, they even prepare war against him.

Job wife is his enemy and is making war with Job with her FOOLISH TEETH.
In the words of Jesus we have Peace but in the world ye shall have tribulation.

JOHN 16:[33] These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world.