When Turkic migrants moved from Central Asia to Anatolia, they were migrating mainly through lands which had already adopted Islam. Depicting animals or humans is prohibited in the Islamic tradition, which does not distinguish between religious and profane life. Since the codification of the Quran by Uthman Ibn Affan in 651 AD/19 AH and the Umayyad Abd al-Malik ibn Marwan reforms, Islamic art has focused on writing and ornament. The borders of Anatolian rugs frequently contain ornaments which were derived from Islamic calligraphy. Usually, these "kufic" borders consist of lam-alif- or alif-lam sequences in an interwoven pattern.