The Ka’bah Or The Grave Of Husain?
According to the Shee’ahs visiting the grave of Husain in Karbala is greater than performing the 5th pillar of Islaam (Hajj).
Al-Majlisi (a top Shiah Scholar) mentions in his book Bihaar Al-Anwaar that Bishr Ad-Dahhan said, I said to Abu ‘Abdullaah Ja’far As-Saadiq, “Sometimes I forget to peform Hajj but I realise the greatness of the grave of Husain.”
So he (Abu Abdullaah) said, “Good work, any believer who visits the grave of Husain knowing its virtue, it will be recorded for him as 20 Hajj and 20 Umrah which are all accepted. It will be recorded for him as 20 battles fought under a Messenger or a just ruler. Whoever goes to it on the day of Arafah, knowing its virtue it will be recorded for him as 1000 Hajj and 1000 Umrah of which are accepted and 1000 battles fought with a Messenger or a just ruler.”
[Bihaar Al-Anwaar, by Al-Majlisi]