9 Whoso is removing stones is grieved by them, Whoso is  cleaving trees endangered by them.
         
                                
                        10 If the iron hath been blunt, And he the face hath not  sharpened, Then doth he increase strength, And wisdom [is]  advantageous to make right.
         
                                
                        11 If the serpent biteth without enchantment, Then there is  no advantage to a master of the tongue.
         
                                
                        12 Words of the mouth of the wise [are] gracious, And the  lips of a fool swallow him up.
         
                                
                        13 The beginning of the words of his mouth [is] folly, And  the latter end of his mouth [Is] mischievous madness.
         
                                
                        14 And the fool multiplieth words: `Man knoweth not that  which is, And that which is after him, who doth declare to  him?`
         
                                
                        15 The labour of the foolish wearieth him, In that he hath  not known to go unto the city.