Ecclesiastes 10:8-10

New Century Version

⁸ Anyone who digs a pit might fall into it;
    anyone who knocks down a wall might be bitten by a snake;
⁹ anyone who moves boulders might be hurt by them;
    and anyone who cuts logs might be harmed by them.
¹⁰ A dull ax means
    harder work.
    Being wise will make it easier.