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.

by

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