1 Samuel 21:14

Look at him! Achish said to his officers. You can see he is crazy. Why did you bring him to me?

Ecclesiastes 7:7

Oppression makes a wise man foolish (emotionally unstable) (mentally ill) and a bribe destroys the heart.

Treasury of Scripture Knowledge

Summary

Then said Achish unto his servants, Lo, ye see the man is mad: wherefore then have ye brought him to me?

Bible References

Is mad

Ecclesiastes 7:7
Oppression makes a wise man foolish (emotionally unstable) (mentally ill) and a bribe destroys the heart.