Imam Ali al-Ridha (p) is reported to have said the following:

“If one who mentions (remembers) our suffering because of what happened to us and cries, such a person will be with us in our position on the Day of Judgment. One who mentions our suffering, then cries or makes others cry, such a person’s eyes will not cry on the day when eyes will cry. One who sits in a gathering and revives our cause therein, such a person’s heart will not die on the day when hearts will die.”

From Shaykh al-Majlisi, Bihar al-anwar, vol. 44, ch. 34, h. 1

For more information on Imam Hussain (p), click here.