Matthew Poole and continuators on Deuteronomy 25:4

4 Thou shalt not muzzle the ox when he treadeth out the corn .

As the Gentiles used to do, having divers devices to keep them from eating when they trod out the corn, which they did in those parts and times by oxen, Hos. 10. 11. either immediately by their hoofs, Isa. 28. 28. Mich. 4. 13. or by drawing carts or other instruments over the corn, Isa. 25. 10. and 28. 27. and 41. 15. Amos 1. 3. Hereby God taught them humanity and kindness even to their beasts that served them, Prov. 12. 10. and much more to their servants or other men who laboured for them, and especially to their Ministers, 1 Cor. 9. 9.

Marginal references: 1 Cor. 9. 9. 1 Tim. 5. 18.; † Heb. thresheth.