مِنَ المُؤمِنِينَ رِجَال صَدَقُوا مَا عْهَدُوا اللهَ عَلَيهِ فَمِنهُم مَّن قَضَىْ نَحبَه وَ مِنهُم مًّن يَنتَظِرُ وَمَا بَدَّلُو تَبدِيلاَ
(Surah No. 33 Aayat No.23)
In Karbala, on the day of Ashura, as each ashaab was, one by one martyred, Aqa Husain A.S. prayed the following ayat: Among the believers are men who fulfilled the pledge they had made to Allah: Among them are those who have redeemed their pledge by death, and among them are those who await [its fulfillment]; they have not caused anything to change(in their religion).
فَاِ نَّهَا تَعدِلُ مِائَةَ حِجَّةٍ
Rasullullah said to Jabir: O Jabir, perform my beloved grandson Husain’s ziyarat. “Husain’s ziyarat is equal to a hundred hajj pilgrimages.” .
From Kalemaat Nooraniya Syedna Taher Saifuddin RA: Angels come to hear the story of Husain’s martyrdom. When mumineen shed tears, the angels gather them in receptacles, and safeguard them as a great treasure, keeping them safe to be given back on the day of resurrection.