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.
Bio: Shlomo Yitzchaki, in Latin: Salomon Isaacides, and today generally known by the acronym Rashi, was a medieval French rabbi and author of a comprehensive commentary on the Talmud and commentary on the Tanakh.