The burial of the martyrs of Karbala/The Bani-Asad clan bury the martyrs of Karbala: the presence of Imam al-Sajjad (ʿa) for the identification and burial of the martyrs/ The secret behind the hexagon design of Imam Husayn (ʿa)’s burial chamber/ How did Imam al-Sajjad (ʿa) manage to come back to Karbala to bury the martyrs despite being a captive at the time?/The Ahl-al-Bayt arrive to Kūfah/The martyrdom of Imam al-Sajjad (ʿa)