Ecclesiastes 10:9 in the World English Bible
Whoever carves out stones may be injured by them. Whoever splits wood may be endangered by it.
Context
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.