Al-Nasir Muhammad Salah al-Din

Al-Nasir Muhammad Salah al-Din or al-Nasir li Din Allah Muhammad Salah al-Din ibn Ali al-Mahdi (Arabic: الناصر لدين الله محمد صلاح الدين بن علي المهدي ) (4 September 1338 – 2 November 1391) was an imam of Yemen who ruled during the period 1372–1391. He was a Zaydi imam and a descendant of the Islamic prophet Muhammad.