לא יבקר בין טוב לרע ולא ימירנו ואם המר ימירנו והיה הוא ותמורתו יהיה קדש
The Torah addresses the laws of maaser beheimah, tithing of animals. Unlike other offerings, for which it is most appropriate to select the choicest animal, the tithe is left purely to chance. Even if the tenth animal to be selected is blemished and thus disqualified from being offered on the Altar, it remains maaser. It is consecrated and may be used only for food. One may neither work with it, nor shear its wool. If, however, he does substitute it (temurah) for another animal, it and its substitute are both holy. Once sanctified, it remains so. Horav Tzvi Hirsch Ferber,…