Hawzah News Agency – Imam sajjad peace be upon him says:

أَیُّمَا مُوْمِنٍ‏ دَمَعَتْ‏ عَیْنَاهُ‏ لِقَتْلِ‏ الْحُسَیْنِ‏ بْنِ عَلِیٍ‏ع دَمْعَهً حَتَّی تَسِیلَ عَلَی خَدِّهِ بَوَّأَهُ اللَّهُ بِهَا فِی الْجَنَّهِ غُرَفاً یَسْکُنُهَا أَحْقَاباً.

‘Every single believer whose eyes shed tears for the martyrdom of al-Husayn (a.s.) such that they roll onto his cheeks, Allah prepares chambers for him in Paradise as a result of them wherein he will dwell for ages.’

Source: [Thawab al-A’amal, p. 108, no. 1]