Proverbs 16:26 in the World English Bible
The appetite of the laboring man labors for him, for his mouth urges him on.
Context
25 There is a way that seemeth right unto a man, but the end thereof are the ways of death.
26 He that laboureth laboureth for himself; for his mouth craveth it of him.
27 An ungodly man diggeth up evil: and in his lips there is as a burning fire.