Deuteronomy 25:4

The ox. From ancient times it was the custom to use oxen for treading out grain. In India today it is the usual thing to muzzle the animals. The treading out of the grain is often painful to the feet of the oxen, and it is not unusual for them to go lame as a result, especially if overworked at the task. This Mosaic precept not only protected the “ox” from cruel treatment but was designed to inculcate tenderheartedness — a trait that was not common among the heathen. Note the sentiments expressed in Proverbs 12:10 on this very point. The apostle Paul referred to Deuteronomy 25:4 as evidence that the ministry should receive a proper and adequate wage, in harmony with the sacred dignity of their office (see 1 Corinthians 9:9; 1 Timothy 5:18; cf. Matthew 10:10). Faithful service, whether of men or of animals, deserves generous recognition.