In regards to this tasbih which is also famous as Tasbihat al-Sayyidah al-Zahra or Tasbihat Hazrat Fatimah al-Zahra, it is said that this is Mustahab (recommended) to say tasbih of Fatimah after every (Wajib/Mustahabb) prayers; it is also emphasized Mustahab to say this dhikr after Fajr prayer.