Eclesiastés 10
Catholic Public Domain Version
10If the iron is dull, and if it was not that way before, but has been made dull by much labor, then it will be sharpened. And wisdom will follow after diligence.
Reina-Valera 1909
10Si se embotare el hierro, y su filo no fuere amolado, hay que añadir entonces más fuerza: empero excede la bondad de la sabiduría.
King James Version
10If the iron be blunt, and he do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.
World English Bible
10If the ax is blunt, and one doesn’t sharpen the edge, then he must use more strength; but skill brings success.