כי תבא בקמת רעך. יכול לעולם? ת"ל "וחרמש לא תניף", בשעה שאתה מניף חרמש על קמת רעך.
(Devarim 23:6) "If you come into the standing corn of your neighbor": I might think (that the verse speaks of) any man (who passes the standing corn); it is, therefore, written (Ibid.) "but you shall not lift a sickle" — when you are lifting a sickle (as a worker) upon your neighbor's standing corn.