wassalam , thank you for sharing. I came by these hadiths when I searched:
It has been narrated from Imame Zamana (a.t.f.s.), “ One who just holds the Tasbeeh made out of the soil of the grave of Imam Husain (as) and does not do any Zikr, even then for him will be written the reward of having recited the Azkaar” (Wasaaelush Shia Vol 4, Pg. 1033)
Imam Jafar Sadiq (as) says: “One zikr or Isteghfaar recited on the Tasbeeh made out of the soil of the grave of Imam Husain (as) is equal to 70 such zikr recited on any other thing.” (Wasaaelush Shia Vol 4, Pg. 1033)