According to Ibn Ishaq, the king of Himyar named Dhu Nuwas had burned the Christians in Najran, and an invading army from Aksum (Habashah) occupied Yemen. Dhu Nuwas decided to kill himself by drowning himself in the sea. Arab tradition states that Dhū Nuwās committed suicide by riding his horse into the Red Sea. The Himyarite kingdom is said to have been ruled prior to Dhu-Nuwas by the Du Yazan dynasty of Jewish converts, as early as the late fourth century.