Shortly after the overhaul of the Caliphate's currency, in circa 700, Abd al-Malik is generally credited with the replacement of Greek with Arabic as the language of the "dīwān" in Syria. The transition was carried out by his scribe Sulayman ibn Sa'd. Al-Hajjaj had initiated the Arabization of the Persian "dīwān" in Iraq, three years before. Though the official language was changed, Greek and Persian-speaking bureaucrats who were versed in Arabic kept their posts. The Arabization of the bureaucracy and currency was the most consequential administrative reform undertaken by the caliph. Arabic ultimately became the sole official language of the Umayyad state, but the transition in faraway provinces, such as Khurasan, did not occur until the 740s. According to Gibb, the decree was the "first step towards the reorganization and unification of the diverse tax-systems in the provinces, and also a step towards a more definitely Muslim administration". Indeed, it formed an important part of the Islamization measures that lent the Umayyad Caliphate "a more ideological and programmatic coloring it had previously lacked", according to Blankinship. In tandem, Abd al-Malik began the export of papyri containing the Muslim statement of belief in Greek to spread Islamic teachings in the Byzantine realm. This was a further testament to the ideological expansion of the Byzantine–Muslim struggle.