I want to ask that after the tragedy of Karbala who buried Imam Hussain a.s, Bani asad or Imam Zain-ul-Abideen?

I mostly heard that Bani-Asad buried but Imam Hussain is Masoom, so only masoom can bury the masoom.

Imām Zaynul Abideen (as) buried Imām Hussain (as). Bani Asad buried the rest of the Shohada