Ecclesiastes 10:8-11

8When you dig a well, you might fall in. When you demolish an old wall, you could be bitten by a snake.

9When you work in a quarry, stones might fall and crush you. When you chop wood, there is danger with each stroke of your ax.

10Using a dull ax requires great strength, so sharpen the blade. That’s the value of wisdom; it helps you succeed.

11If a snake bites before you charm it, what’s the use of being a snake charmer?