Hadith 1:

Regarding the Almighty’s words in Sura-e-Baqara, Verse 84-86:

و اذ اخذنا ميثاقكم لا تسفكون دماءكم و لا تخرجون انفسكم من دياركم ثم اقررتم و انتم تشهدون ثم هولاء تقتلون انفسكم و تخرجون فريقا منكم من ديارهم تظاهرون عليهم بالاثم و العدوان و ان ياتوكم اسري تفادوهم و هو محرم عليكم اخراجهم افتومنون ببعض الكتاب و تكفرون ببعض فما جزاء من يفعل ذلك منكم الا خزي في الحيوه الدنيا و يوم القامۀ يردون الي اشد العذاب و مالله بغافل عما تعملون اوليك الذين اشتروا الحيوه الدنيا بالاخره فلايخفف عنهم العذاب و لا هم ينصرون

"And when We made a covenant with you: You shall not shed your blood and you shall not turn your people out of your cities; then you gave a promise while you witnessed. Yet you it is who slay your people and turn a party from among you out of their homes, backing each other up against them unlawfully and exceeding the limits; and if they should come to you, as captives you would ransom them - while their very turning out was unlawful for you. Do you then believe in a part of the Book and disbelieve in the other? What then is the reward of such among you as do this but disgrace in the life of this world, and on Judgment Day they shall be sent back to the most grievous chastisement, and Allah is not at all heedless of what you do. These are they who buy the life of this world for the hereafter, so their chastisement shall not be lightened, nor shall they be helped."

When this verse was revealed about Jews who broke promises and slew their prophets and apostles, the Holy Prophet (s.a.w.s.) said: Do you want me to inform you about those from my Ummah who will be like these Jews? The companions said: O Allah’s Messenger, tell us. 

His Eminence (s.a.w.s.) said: There will be some people in my Ummah who will claim to be on my religion but inspite of this they would kill the greatest personalities of my progeny and the purest ones of my family. They will change my laws and traditions and slay my two sons, Hasan and Husain (a.s.). The forefathers of these Jews slew Zakariya and Yahya (a.s.). Know that, just as Allah cursed those Jews, in the same way would He curse these people. And for the future generation of them, He would send a Hadi Mahdi (rightful guide) from the progeny of Husain (a.s.) before Qiyamat who would dispatch them to Hellfire with the help of his friends’ swords.

Know that, Allah curses those who remain quiet and do not curse the murderers of Husain (a.s.) and associates of murderers. May Allah have mercy on those who weep on this oppressed one, curse his enemies and remain furious with them. O people, listen! Those who are pleased with the martyrdom of Husain (a.s.) and are also included among his killers. And listen! Those who follow Husain’s (a.s.) enemies and their associates, they all are disgusted of the religion of Allah.

Almighty Allah orders His proximate angels to collect tears of people who weep in sorrow of Husain (a.s.) and take them to the treasurer of Paradise. They take those tears and mix them with the water of the spring, due to which it becomes a thousand times sweeter and delicious. Those who become happy on the martyrdom of Imam Husain (a.s.) and laugh at it, the angels take their tears to Hawiya and mix them with its hot water and pus so that its temperature and severity increase. When the enemies of Aale Muhammad (a.s.) enter Hell, due to this, they will be involved in a more severe chastisement.

[Source: Tafseer of Imam Hasan Askari(as), Sura-e-Baqara, Verse 84-86]

Hadith 2:

حدثني أبي رحمه الله، عن سعد بن عبد الله، عن أبي عبد الله الجاموراني، عن الحسن بن علي بن أبي حمزة، عن أبيه، عن أبي عبد الله (عليه السلام)، قال: سمعته يقول: إنَّ البكاء والجزع مكروهٌ للعبد في كلِّ ما جزع ما خلا البكاء والجزع على الحسين بن عليّ عليهما السلام ، فإنّه فيه مأجورٌ

Narrated that Abu Abdillah Imam Sadiq (as) said:

"Crying and JAZA* is Makruh for the slaves (of Allah) over any matter except crying and Jaza over Husain ibn Ali (as). For verily in this case he will be rewarded."

[Source: Kamil Az Ziyarat, Chapter. 32, Hadith. 2]

*JAZA (جزع) - uneasiness, restlessness and acting impatiently. Some examples include wearing black clothes and hitting the chests.

Hadith 3:

وحدثني محمد بن جعفر الرزاز، عن خاله محمد بن الحسين الزيات، عن محمد بن إسماعيل، عن صالح بن عقبة، عن أبي هارون المكفوف، قال: قال أبو عبد الله (عليه السلام) في حديث طويل له : ومن ذكر الحسين (عليه السلام) عنده فخرج من عينيه من الدموع مقدار جناح ذباب، كان ثوابه على الله عز وجل، ولم يرض له بدون الجنة

Narrated Abu Abdillah Imam Sadiq (as) said:

"And whoever when Imam Husain (as) is mentioned in his presence and tears come out of his eyes of the size of a fly's wing, his reward will be upon Allah (عز و جل) and Allah will not be pleased with any reward for him otherthan paradise."

[Source: Kamil Az Ziyarat, Chapter. 32, Hadith. 3]

Hadith 4:

 حدثني حكيم بن داود بن حكيم، عن سلمة بن الخطاب، قال: حدثنا بكار بن أحمد القسام والحسن بن عبد الواحد، عن مخول بن إبراهيم، عن الربيع بن منذر، عن أبيه، قال: سمعت علي بن الحسين (عليهما السلام) يقول: من قطرت عيناه فينا قطرة ودمعت عيناه فينا دمعة، بوأه الله بها في الجنة غرفا يسكنها أحقابا

Narrated that Imam Ali ibn Husain (as) said:

"Anyone whose eyes drop tears for Us or whose eyes is filled with tears for Us, Allah will make him live in paradise in rooms that he will inhabit for ages."

[Source: Kamil Az Ziyarat, Chapter. 32, Hadith. 4]

Hadith 5:

وما بكى أحدٌ رَحمةً لنا ولما لقينا إلاّ رحمه الله قبل أن تخرج الدَّمعة من عينه ، فإذا سالَتْ دُموعه على خَدِّه ، فلو أن قطرةً مِن دُموعه سَقَطتْ في جهنَّم لأطْفَئتْ حَرَّها حتى لا يوجد لها حَرٌّ

Narrated that Imam Sadiq (as) said:

"And no one cries sympathizing with Us and what (oppression) was done to Us, but that Allah will have mercy upon him even before a tear comes out of his eye. And if his tears flow down upon his cheek, so a drop of his tears falls into hell it would extinguish its heat until no heat would remain in it."

(Part of a long narration)

[Source: Kamil Az Ziyarat, Chapter. 32, Hadith. 7]

Hadith 6:

وعنه، عن سلمة، عن علي بن سيف، عن بكر بن محمد، عن فضيل بن فضالة، عن أبي عبد الله (عليه السلام)، قال: من ذكرنا عنده ففاضت عيناه حرم الله وجهه على النار

Narrated that Abu Abdillah Imam Sadiq (as) said:

"Whoever when we are mentioned and his eyes overflowed (with tears), Allah makes the fire forbiden for his face."

[Source: Kamil Az Ziyarat, Chapter. 32, Hadith. 12]

Hadith 7:

حدثنا محمد بن إبراهيم بن إسحاق (رحمه الله)، قال: أخبرنا أحمد بن محمد الهمداني، عن علي بن الحسن بن علي بن فضال، عن أبيه، قال: قال الرضا (عليه السلام): مَن تَذَكَّرَ مُصابَنا وبَكى لِمَا ارتُكِبَ مِنّا كانَ مَعَنا في دَرَجَتِنا يَومَ القِيامَةِ . ومَن ذَكَّرَ بِمُصابِنا فَبَكى وأبكى ، لَم تَبكِ عَينُهُ يَومَ تَبكِي العُيونُ . ومَن جَلَسَ مَجلِسا يُحيي فيهِ أمرَنا ، لَم يَمُت قَلبُهُ يَومَ تَموتُ القُلوبُ

Narrated that Imam al-Ridha (عليه السلام) said,

“Whoever remembers Our affliction, and cries for what was committed against Us, will be with Us in Our ranks on the Day of Judgement.

And the one who reminds others of Our affliction, and he cries and makes others cries, his eyes will not cry on the day that other eyes will be crying (i.e., one the day of Judgement).

And whoever sits in a gathering in which Our affairs/matters (Amr) are enlivened/revived, his heart will not die on the day the hearts die (i.e., on the day of Judgement.”

[Source: al-Amali, Shaikh Sadooq, Pg. 131]

Hadith 8:

From a lengthy narration as narrated from Imam Sadiq (عليه السلام):

وما من عين أحب إلى الله ولا عبرة من عين بكت ودمعت عليه، وما من باك يبكيه الا وقد وصل فاطمة (عليهما السلام) وأسعدها عليه، ووصل رسول الله وادي حقنا

"There are no eyes and tears loved more by Allah than the eyes of those who cry and shed tears over Imam Husayn (عليه السلام). And there is none who cries upon Him, but that He has connected with Fatimah (عليها السلام) and he supported Her upon it, and has connected with the Prophet of Allah (صلى الله عليه وآله) and has fulfilled our rights."

[Source: Kamil al-Ziyarat, Pg. 168]