Bekhorot 27: Year by Year

<p>If the kohen demands the first-born before the prescribed time, the owner does not need to provide it, because it seems that such a kohen would look too close to an employee of the owner -- for taking care of the animal. Also, more on the question of giving terumah to the kohen when it does appear that he assists &quot;on the threshing floor.&quot; Note the fact of a rabbinic level of terumah as well as a Torah level. Also, delving into the meaning of &quot;shanah be-shanah&quot; - year by year, with regard to the first-born&#39;s year, the calendar year, or perhaps the time of eating the sacrifice of the first-born. </p>