'Understanding' in the Bible

“All the men allied with youShall send you on your way to the border;The men who were at peace with youShall deceive you and overpower you;Those who eat your bread [those you trust]Shall set a hostile ambush for you.(There is no understanding of it.)

“Will I not on that day,” says the Lord,“Destroy the wise men from Edom [removing all wisdom]And understanding from the mountain of Esau?