Ecclesiastes 10:8-10

Authorized (King James) Version

⁸ He that diggeth a pit shall fall into it;
and whoso breaketh an hedge, a serpent shall bite him.
⁹ Whoso removeth stones shall be hurt therewith;
and he that cleaveth wood shall be endangered thereby.
¹⁰ If the iron be blunt, and he do not whet the edge,
then must he put to more strength:
but wisdom is profitable to direct.