Passage cross-references.

The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.

And the sons of Jacob came out of the field when they heard it: and the men were grieved, and they were very wroth, because he had wrought folly in Israel in lying with Jacob’s daughter; which thing ought not to be done.

Up, sanctify the people, and say, Sanctify yourselves against to morrow: for thus saith the LORD God of Israel, There is an accursed thing in the midst of thee, O Israel: thou canst not stand before thine enemies, until ye take away the accursed thing from among you.

And she answered him, Nay, my brother, do not force me; for no such thing ought to be done in Israel: do not thou this folly.

Let a bear robbed of her whelps meet a man, rather than a fool in his folly.

As a dog returneth to his vomit, so a fool returneth to his folly.

And I gave my heart to seek and search out by wisdom concerning all things that are done under heaven: this sore travail hath God given to the sons of man to be exercised therewith. …

I said in mine heart, Go to now, I will prove thee with mirth, therefore enjoy pleasure: and, behold, this also is vanity. …

And I turned myself to behold wisdom, and madness, and folly: for what can the man do that cometh after the king? even that which hath been already done.

Then said I in my heart, As it happeneth to the fool, so it happeneth even to me; and why was I then more wise? Then I said in my heart, that this also is vanity.

Therefore I went about to cause my heart to despair of all the labour which I took under the sun.

And moreover I saw under the sun the place of judgment, that wickedness was there; and the place of righteousness, that iniquity was there. …

Behold, this have I found, saith the preacher, counting one by one, to find out the account:

For all this I considered in my heart even to declare all this, that the righteous, and the wise, and their works, are in the hand of God: no man knoweth either love or hatred by all that is before them. …

Righteous art thou, O LORD, when I plead with thee: yet let me talk with thee of thy judgments: Wherefore doth the way of the wicked prosper? wherefore are all they happy that deal very treacherously? …

And through covetousness shall they with feigned words make merchandise of you: whose judgment now of a long time lingereth not, and their damnation slumbereth not. …

Knowing this first, that there shall come in the last days scoffers, walking after their own lusts, …