'Empty headed' in the Bible

An empty-headed person will gain understanding when a wild donkey is born a human being!"

The [spiritually ignorant] fool has said in his heart, “There is no God.”They are corrupt, they have committed repulsive and unspeakable deeds;There is no one who does good.

The [empty-headed] fool has said in his heart, “There is no God.”They are corrupt and evil, and have committed repulsive injustice;There is no one who does good.

And among the naive [the inexperienced and gullible],I saw among the youthsA young man lacking [good] sense,

Excellent speech does not benefit a fool [who is spiritually blind],Much less do lying lips benefit a prince.

He who becomes the parent of a fool [who is spiritually blind] does so to his sorrow,And the father of a fool [who is spiritually blind] has no joy.

Under a servant when he reigns,Under a [spiritually blind] fool when he is filled with food,

But I say to you that everyone who continues to be angry with his brother or harbors malice against him shall be guilty before the court; and whoever speaks [contemptuously and insultingly] to his brother, ‘Raca (You empty-headed idiot)!’ shall be guilty before the supreme court (Sanhedrin); and whoever says, ‘You fool!’ shall be in danger of the fiery hell.