It is speculated that Jews were among the first to use this amulet due to their beliefs about the evil eye. The symbol of the hand appears in Kabbalistic manuscripts and amulets, doubling as the Hebrew letter "Shin", the first letter of "Shaddai", one of the names referring to God. The use of the hamsa in Jewish culture has been intermittent, utilized often by Jews during the late nineteenth and early twentieth centuries, then less and less over time into the mid-twentieth century. However, the notion of a protective hand has been present in Judaism dating all the way back to Biblical times, where it is referenced in Deuteronomy 5:15, stated in the Ten Commandments as the "strong hand" of God who led the Jews out of Egypt. The "hamsa" is later seen in Jewish art as God's hand reaching down from heaven during the times of late antiquity, the Byzantine period, and even medieval Europe. Its use by Ashkenazi Jewish communities from this period is well-known, and evidence has also emerged of the hamsa being used by Jews from medieval Spain, often associated with "sympathetic magic". Historians such as Shalom Sabar believe that after the Jewish expulsion from Spain in 1492, exiled Jews likely used the hamsa as protection in the foreign lands they were forced to relocate to, however this assumption has been difficult to prove. According to Sabar, the hamsa has also been used later by Jews in Europe "as a distinctive sign of the priesthood, especially when they wished to show that a person was of priestly descent...".