These photographs, taken at the beginning of the 20th century, show a farmer using muzzled cattle to thresh grain. To begin separating the wheat from the chaff, farmers used bulls to pull a threshing sledge over cut grain. A muzzle prevented the animal from eating while it worked. Revealing Jehovah’s loving consideration for animals, the Mosaic Law forbade this practice. (De 25:4) A hungry animal would be tormented if it had to work hard with grain so close at hand. The apostle Paul reasoned on the principle behind this command, stating that hardworking Christian ministers are permitted to receive due honor and material support from others.​—1Co 9:9-14; 1Ti 5:17, 18.