8 Whoever digs a pit may fall into it; whoever breaks through a wall may be bitten by a snake.

Read Ecclesiastes 10:8 Using Other Translations

He that diggeth a pit shall fall into it; and whoso breaketh an hedge, a serpent shall bite him.
He who digs a pit will fall into it, and a serpent will bite him who breaks through a wall.
When you dig a well, you might fall in. When you demolish an old wall, you could be bitten by a snake.