> The name 'Shield of David' was used by at least the 11th century as a title of the God of Israel, independent of the use of the symbol. The phrase occurs independently as a Divine title in the Siddur, the traditional Jewish prayer book, where it poetically refers to the Divine protection of ancient King David and the anticipated restoration of his dynastic house, perhaps based on Psalm 18, which is attributed to David, and in which God is compared to a shield (v. 31 and v. 36).
The term occurs at the end of the "Samkhaynu/Gladden us" blessing, which is recited after the reading of the Haf…