1. The eighty-sixth subject is this, that it is not proper to kill a beaver [1]; but, if they see it in any place, it is necessary to take it up and carry it to running water. 2. For, in the commentary of the Vendîdâd it is ranked [2] as a great sin for the killer [3]; and, as to every one who kills a beaver, the source of his seed becomes exhausted.