Verses with the word foolishness in the Apocrypha (6 verses):

Wisdom of Solomon 10:8
For regarding not wisdom, they gat not only this hurt, that they knew not the things which were good; but also left behind them to the world a memorial of their foolishness: so that in the things wherein they offended they could not so much as be hid.

Sirach 16:7
He was not pacified toward the old giants, who fell away in the strength of their foolishness.

Sirach 23:8
The sinner shall be left in his foolishness: both the evil speaker and the proud shall fall thereby.

Sirach 41:15
A man that hideth his foolishness is better than a man that hideth his wisdom.

Sirach 47:23
Thus rested Solomon with his fathers, and of his seed he left behind him Roboam, even the foolishness of the people, and one that had no understanding, who turned away the people through his counsel. There was also Jeroboam the son of Nebat, who caused Israel to sin, and shewed Ephraim the way of sin:

Baruch 3:28
But they were destroyed, because they had no wisdom, and perished through their own foolishness.