Only this incident inseparable every custom must have, viz., that it be consonant to reason; for how long soever it hath continued, if it be against reason, it is of no force in law.

The First Part of the Institutes of the Laws of England, or, A Commentary on Littleton, part 62a (London, 1628, ed. F. Hargrave and C. Butler, 19th ed., London, 1832).