Tertullian
Patristic
c. A.D. 150–220
“To these prime counsels of innocence, chastity, and justice, and piety, are also added prescriptions of humanity, as when every seventh year slaves are released for liberty; when at the same period the land is spared from tillage; a place is also granted to the needy; and from the treading ox's mouth the muzzle is removed, for the enjoyment of the fruit of his labour before him, in order that kindness first shown in the case of animals might be raised from such rudiments to the refreshment of men.”