Proverbs 16:26 in the King James Version
He that laboureth laboureth for himself; for his mouth craveth it of him.
Context
25 There is a way which seems right to a man, but in the end it leads to death.
26 The appetite of the laboring man labors for him, for his mouth urges him on.
27 A worthless man devises mischief. His speech is like a scorching fire.