'Fool' in the Bible

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

For he seeth that wise men die; all alike, the fool and the brutish perish, and they leave their wealth to others.

{To the chief Musician. On Mahalath: an instruction. Of David.} The fool hath said in his heart, There is no God! They have corrupted themselves, and have done abominable iniquity: there is none that doeth good.

A brutish man knoweth not, neither doth a fool understand it.