The Importance of the Rosaries of Hazrat Fatima Zahra (PBUH)

  Rosaries of Hazrat Zahra (S.A), which is of particular importance and is one of the teachings of the Holy Prophet (PBUH), are recommended after every prayer.

And especially some people believe that the beads of the rosary are from the ashes of Hazrat Seyyed al-Shaheda (AS).

Hazrat Fatimah (S.A) was bound that the beads of her rosary should be from the ashes of the "Martyr's" grave.

  Shahid Motahari says:

Sadiqa Kabri Fatima Zahra (S.A) when the Prophet instructed her to recite the famous Rosaries (34 times Allahu Akbar, 33 times Alhamdulillah, 33 times Glory be to Allah) which we usually recite after prayer as a follow-up or at bedtime.

He came to the grave of his honorable uncle Hamzah and made a rosary for himself from the martyr's tomb. These have meaning. What does that mean?
The soil is a respected martyr. The grave of the martyr is respected.
In order to count his remembrances and prayers, a person needs prayer. What difference does it make if the rosary beads are made of stone or wood or soil?
And he has taken it from every soil, but we take it from the soil of martyrdom, and this is a kind of respect for the martyr and martyrdom. It is a kind of recognition of the sanctity of martyrdom.

The Soil of Hussain bin Ali.

Those of us who want to pray and on the other hand do not allow prostration on the carpet and on the clothed mats, we take earth or stones with us.
But our leaders have told us that now that it is necessary to prostrate on the soil, it is better that the soil should be the soil of martyrs.
  If you can, prepare for yourself from the soil of Karbala, which smells like a martyr; That is, you who worship God, put your head on any soil, your prayer is correct
  But if you lay your head on that soil that has a small contact, a small affinity, a small neighbourhood with a martyr and smells like a martyr, your reward will be a hundredfold.

The Imam said:(Imam Khomeini)

Prostrate on the shrine of my ancestor Hussain bin Ali, because the prayer you have prostrated on that holy shrine will tear the seven veils. That is, understand the value of a martyr! His soil gives value to your prayer.[1]

The says about Martyrs

  "And those who believe in God and His Messenger, those are righteous and the martyrs with their Lord, for them is their reward and their light, and those who disbelieved and lied to our verses." [2]

References:

[1] Collection of the works of master Shahid Motahari/ vol. 24/ p. 475

[2] Hadid/19, وَ الَّذينَ آمَنُوا بِاللَّهِ وَ رُسُلِهِ أُولئِكَ هُمُ الصِّدِّيقُونَ وَ الشُّهَداءُ عِنْدَ رَبِّهِمْ لَهُمْ أَجْرُهُمْ وَ نُورُهُمْ وَ الَّذينَ كَفَرُوا وَ كَذَّبُوا بِآياتِنا أُولئِكَ أَصْحابُ