DICT.TW Dictionary Taiwan

 Door-posts
    The Jews were commanded to write the divine name on the posts
    (mezuzoth') of their doors (Deut. 6:9). The Jews,
    misunderstanding this injunction, adopted the custom of writing
    on a slip of parchment these verses (Deut. 6:4-9, and 11:13-21),
    which they enclosed in a reed or cylinder and fixed on the
    right-hand door-post of every room in the house.