9 Whosoever moves the stones shall have tribulation along with it, and he that cuts the firewood shall be endangered by it.
10 If the iron is blunt, and he does not whet the edge, then he must put forth more strength, but the advantages of wisdom excel.
11 If the serpent bites without being enchanted, then the babbler is no more.
12 The words from the mouth of the wise man are grace, but the lips of the fool will swallow up himself.
13 The beginning of the words of his mouth is foolishness, and the end of his talk is mischievous madness.
14 The fool multiplies words and says, Man cannot tell what shall be, and what shall be after him, who can tell him?
15 The labour of the foolish wearies all of them because they do not know how to go to the city.