Shrine of Sayyid Muhammad ibn Ali al-Hadi

Abu Ja'far Muhammad ibn Ali al-Hadi (b. 228 AH/842-3 CE, Sarya near Medina - d. 252 AH/866 CE, Balad), known reverently as "Sayyid Muhammad" and "Sabu' al-Dujayl" (the Lion of Dujayl), was the eldest son of the tenth Imam, Ali al-Hadi, and elder brother of the eleventh Imam, Hasan al-Askari. Renowned for his piety, humility and noble character, many of his father's followers expected him to succeed as the next Imam, and some smaller groups (the "Muhammadites") continued to regard him as such even after his death. He fell ill while journeying from Samarra toward Hijaz for pilgrimage and died at Balad, roughly 50 km south of Samarra; some sources state the Abbasids poisoned him. Imam al-Hasan al-Askari tore his own shirt in grief on hearing the news, comparing his loss to that of Prophet Musa mourning Harun. His shrine at Balad, Salah al-Din Province, has been a major site of Shia pilgrimage for centuries, associated with numerous reported karamat (miracles). On 7 July 2016, the shrine was the target of a devastating ISIL attack during Eid al-Fitr that killed at least 40 pilgrims and injured 74.