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On the night of Ashura, Recite 4 rak’ah nafil with 2 salams after Isha prayers. In each Rak’ah recite Surah Fatiha 1 times, Ayat-Ul-Kursi 3 times and Surah Ikhlas 10 times. After Salam recite Surah Ikhlas 100 times and repent of your sins And ask forgiveness to Allah SWT. Inshallah, Allah with His perfect mercy will forgive all the sins of those who perform this prayer.
Night Of Ashura:
Perform 8 rak’ah nafil after esha prayer with 4 salam. In each rak’ah recite Surah Fatiha 1 time, Surah Ikhlas 25 times after salam recite Durood Pak 70 times and Astaghfaar 70 times now pray from Allah SWT for forgiveness. 
Allah will illuminate the grave of those who offer this prayer and protect it from torment, And on the Day of Judgment he will be forgiven, Inshallah.
In the night of Ashora recite 4 rak’ah nafil namaz with 2 salam after esha prayer. In each raka’h recite Surah Fatiha 1 time and Surah Ikhlas 5 time.
This prayer is very beneficial to forgiveness of sins. Whoever perform this prayer Allah SWT will forgive his all sins. Inshallah.
On the night of Ashora recite 4 rak’ah nafil namaz with 2 salam after esha prayer. In each rak’ah recite Surah Fatiha 1 time, Ayat-Ul-Kursi 3 times, and Surah Ikhlas 3 times. After salam recite Surah Ikhas 100 times. Inshallah, Allah SWT will blessed him will rewards in paradise who perform this prayer.