Ecclesiastes 10:8-10

World English Bible

⁸ He who digs a pit may fall into it; and whoever breaks through a wall may be bitten by a snake. ⁹ Whoever carves out stones may be injured by them. Whoever splits wood may be endangered by it. ¹⁰ If the ax is blunt, and one doesn’t sharpen the edge, then he must use more strength; but skill brings success.