The Hamsa is an old and still very popular and wide spread hand shaped apotropaic amulet used for protection and blessing. Its name comes from a Semitic root and literally means "five". The Hamsa is usually shaped in the form of a symmetrical hand, with thumbs on both side, and not in the anatomically correct way. Today, It is widely used by both Jewish and Muslim people, although it's originated to ancient's times.
The Hamsa is also known as "Yad Ha-Hamesh" (The hand of five) or "The hand of Miriam" after the sister of Moses and Aaron. It is also connected to five books of the Torah.
The Hamsa is used to ward of the evil eye and can be found on the entrances of homes, hanging on a wall in the office, in cars, on charm bracelets and chains and more. Hamsas are often decorated with prayers of a protective fashion such as the Sh'ma Prayer, the "Birkat HaBayit" (Blessing for the Home), the "Tefilat HaDerech" (Traveler's Prayer) and so on.