Οὐ φιμώσεις βοῦν ἀλοῶντα.

1. Οὐ
   Not
2. φιμώσεις
   you shall muzzle
3. βοῦν
   ox
4. ἀλοῶντα
   threshing
5.  
   .
    

You shall not muzzle an ox while it is threshing.