'Fool' in the Bible

{To the chief Musician, A Psalm of David.} The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good.

For he seeth that wise men die, likewise the fool and the brutish person perish, and leave their wealth to others.

{To the chief Musician upon Mahalath, Maschil, A Psalm of David.} The fool hath said in his heart, There is no God. Corrupt are they, and have done abominable iniquity: there is none that doeth good.

A brutish man knoweth not; neither doth a fool understand this.