قَالَ فَبَكَى الصَّادِقُ ؑ حَتّٰى اخْضَلَّتْ لِحْيَتُهُ بِالدُّمُوعِ ثُمَّ قَالَ لَا قَرَّتْ عَيْنٌ لَا تَبْكِي عِنْدَ هٰذَا الذِّكْرِ قَالَ وَ بَكَى الْمُفَضَّلُ بُكَاءً طَوِيلًا ثُمَّ قَالَ يَا مَوْلَايَ مَا فِي الدُّمُوعِ يَا مَوْلَايَ فَقَالَ مَا لَا يُحْصَى اِذَا كَانَ مِنْ مُحِقٍّ
Mufazzal Ibn Umar reports then Imam Sadeq (peace be on him) cried to such an extent that his beard was drenched with tears and said
‘May Allah not soothe the eye that does not cry at the mention of this (i.e. martyrdom of Mohsin).’
Hearing this, Mufazzal cried for a very long time and asked ‘O my master! What is the reward in these tears?’
He (peace be on him) replied
‘If he is on the truth then its reward cannot be enumerated.’
References:
1. Behaar al-Anwaar, vol. 53, p. 22