Ecclesiastes 1:17 - And I gave my heart to know wisdom, and to know madness H1947 and folly: I perceived that this also is vexation of spirit.
Ecclesiastes 2:12 - And I turned myself to behold wisdom, and madness, H1947 and folly: for what can the man do that cometh after the king? even that which hath been already done.
Ecclesiastes 7:25 - I applied mine heart to know, and to search, and to seek out wisdom, and the reason of things, and to know the wickedness of folly, even of foolishness and madness: H1947
Ecclesiastes 9:3 - This is an evil among all things that are done under the sun, that there is one event unto all: yea, also the heart of the sons of men is full of evil, and madness H1947 is in their heart while they live, and after that they go to the dead.