1 Timothy 5:18

18 for the Writing saith, `An ox treading out thou shalt not muzzle,' and `Worthy [is] the workman of his reward.'

1 Timothy 5:18 In-Context

16 If any believing man or believing woman have widows, let them relieve them, and let not the assembly be burdened, that those really widows it may relieve.
17 The well-leading elders of double honour let them be counted worthy, especially those labouring in word and teaching,
18 for the Writing saith, `An ox treading out thou shalt not muzzle,' and `Worthy [is] the workman of his reward.'
19 Against an elder an accusation receive not, except upon two or three witnesses.
20 Those sinning, reprove before all, that the others also may have fear;
Young's Literal Translation is in the public domain.