Kohelet 10:10-12

Orthodox Jewish Bible

¹⁰ If the barzel (iron [of the axe]) be blunt, and he do not whet the edge, then must more strength be marshalled; but chochmah brings success.

¹¹ If the nachash will bite before it is charmed, there is no use in a charmer.

¹² The words of a chacham’s mouth are chen (gracious); but the lips of a kesil will swallow up himself.