To Whom It may concern:
If you do not know anything does not mean it is not part of the history
One of that story does exist in the books of History however cannot be confirmed by authentic source (imo).
Karbala is a myth and i am yet to come across even one scholar who knows everything about Karbala.
It is like a bead of the "Tasbih". Some peoples know a little while other knows other part of the story. It is not easy to know all the facts. Just to know why Karbala took place you can write 10s or may be 100s of books and then imagine how many books you can write on the war?.
I heard about this Brahmin family couple of years ago and i am yet to read from any authentic source. Those who believes quoted only verbally and i am yet to come across any reliable book where these facts were mentioned but one thing is certain this chapter does exist in History.