Ecclesiastes 10:7-11

I have seen slaves riding on horses and princes walking like slaves on the land.

One who digs a pit may fall into it, and a serpent may bite one who breaks through a wall.

One who quarries stones may be hurt by them, and one who splits logs may be endangered by them.

If the axe is dull and he does not sharpen its edge, then he must exert more strength. Wisdom has the advantage of bringing success.

If the serpent bites before being charmed, there is no benefit for the charmer.