Ecclesiastes 10:8-11

8The one who digs a pit may fall into it, and the one who breaks through a wall may be bitten by a snake.

9The one who quarries stones may be hurt by them; the one who splits logs may be endangered by them.

10If the ax is dull, and one does not sharpen its edge, then one must exert more strength; however, the advantage of wisdom is that it brings success.

11If the snake bites before it is charmed, then there is no advantage for the charmer.