Dhu al-Kala Samayfa ibn Nakur al-Himyari (Arabic: ذُو ٱلْكَلاَع سْمَيْفَع بْنُ نَاكُور الْحِمْيَرِيّ, romanized: Dhu al-Kalāʿ Samayfaʿ ibn Nākūr al-Ḥimyarī) was a commander of the Muslim conquest of Syria in the 630s and leader of the Himyar tribe in Islamic Syria and founder of its noble household, the Dhu al-Kala. He was based in the city of Homs where the Himyar and other Yemenite tribes dominated the Muslim garrison and heeded Samayfa over the overall governor of Syria, Mu'awiya ibn Abi Sufyan. He fought as one of the elite commanders in the latter's army at the Battle of Siffin and his death in combat led to the Himyar's decline in Syria.