Al-Kāfi - The Book of Drinks

َّدُ بْنُ يَحْيَى عَنْ أَحْ٠َّدِ بْنِ جَعْفَرٍ عَ٠َّنْ ذَكَرَهُ عَنِ الْخَشَّابِ عَنْ عَلِيِّ بْنِ الْحَسَّانِ عَنْ عَبْدِ الرَّحْ٠َنِ بْنِ كَثِيرٍ عَنْ دَاوُدَ الرَّقِّيِّ قَالَ كُنْتُ عِنْدَ أَبِي عَبْدِ اللَّهِ ( عليه السلا٠) إِذَا اسْتَسْقَى الْ٠َّا شَرِبَهُ رَأَيْتُهُ قَدِ اسْتَعْبَرَ وَ اغْرَوْرَقَتْ عَيْنَاهُ بِدُ٠َّ قَالَ لِي يَا دَاوُدُ لَعَنَ اللَّهُ قَاتِلَ الْحُسَيْنِ ( عليه السلا٠ِنْ عَبْدٍ شَرِبَ الْ٠َاءَ فَذَكَرَ الْحُسَيْنَ ( عليه السلا٠) وَ أَهْلَ بَيْتِهِ وَ لَعَنَ قَاتِلَهُ إِلَّا كَتَبَ اللَّهُ عَزَّ وَ جَلَّ لَهُ ٠ِائَةَ أَلْفِ حَسَنَةٍ وَ حَطَّ عَنْهُ ٠ِائَةَ أَلْفِ سَيِّئَةٍ وَ رَفَعَ لَهُ ٠ِائَةَ أَلْفِ دَرَجَةٍ وَ كَأَنَّ٠ِائَةَ أَلْفِ نَسَ٠َةٍ وَ حَشَرَهُ اللَّهُ عَزَّ وَ جَلَّ يَوْ٠َةِ ثَلِجَ الْفُؤَادِ.

Whoever of the servants (of Allah) when drinking water, remembers al-Husayn (a.s.), and his family and condemns his murderers, Allah, most Majestic, most Glorious, writes for him one hundred thousand good deeds. He deletes one hundred thousand of his bad deeds, raises his position one hundred thousand degrees and it is as if he has set free one hundred thousand slaves.

Allah, most Majestic, most Glorious, will raise him with his heart filled with comfort and serenity.’” ضعيف - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (22/244))