The Al Saud , the ruling family of Saudi Arabia, has long been closely associated with the Wahhabi religious movement. The Wahhabis, since the 18th century, had used the shahada on their flags.  In 1902 Abdulaziz Abdulrahman Al-Saud , leader of the Al Saud and the future founder of the Kingdom of Saudi Arabia, added a sword to this flag.  The design of the flag was not standardized prior to March 15, 1973, and variants with two swords and/or a white vertical stripe at the hoist were frequently used. By 1938, the flag had basically assumed its present form, except the sword had a different design (with a more curved blade) and it, along with the shahada above, took up more of the flag's space.