Hadith 1:

عن أبي هاشم قال دخلت على أبي محمد (ع) وكان يكتب كتاباً فحان وقت الصلاة الأولى فوضع الكتاب من يده وقام (ع) الى الصلاة, فرأيت القلم يمر على باقي القرطاس من الكتاب ويكتب حتى انتهى الى آخره, فخررت له ساجداً, فلما انصرف من الصلاة أخذ القلم بيده وأذن للناس.

Narrated from Abu Hashim,

"I came to Imam Hasan al-Askari (ع) and the Imam was writing a letter. When it was time for Salaat/Prayer, He (ع) put the paper down from His hand and stood up for prayer. And I saw the pen moving over the paper & writing on the paper till it reached its end. So I went down into prostration to Him (out of respect or thanks?). When the Imam (ع) finished praying, He took the pen by His hand and gave permission for people to enter."

[Source: Uyoon al-Mojizaat, Pg. 134]

Hadith 2:

عَلِيُّ بْنُ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ الْعَلَوِيِّ قَالَ حُبِسَ أَبُو مُحَمَّدٍ عِنْدَ عَلِيِّ بْنِ نَارْمَشَ وَهُوَ أَنْصَبُ النَّاسِ وَأَشَدُّهُمْ عَلَى آلِ أَبِي طَالِبٍ وَقِيلَ لَهُ افْعَلْ بِهِ وَافْعَلْ فَمَا أَقَامَ عِنْدَهُ إِلا يَوْماً حَتَّى وَضَعَ خَدَّيْهِ لَهُ وَكَانَ لا يَرْفَعُ بَصَرَهُ إِلَيْهِ إِجْلالاً وَإِعْظَاماً فَخَرَجَ مِنْ عِنْدِهِ وَهُوَ أَحْسَنُ النَّاسِ بَصِيرَةً وَأَحْسَنُهُمْ فِيهِ قَوْلاً

Narrated that Abu Muhammad Imam Hasan Askari (ع) was imprisoned under the supervision of Ali ibn Narmasha who was one of the extremely hostile men towards the descendants of Abu Talib (ع). The Imam had stayed with him only for a day and the guard who was hostile towards him placed his cheek in submission to Him & he would not raise his eyes towards him due to honor/esteem/respect and greatness. And the Imam came out from his prison in such a state that the guard had turned into having the highest degree of understanding of Him and would speak the best words about Him.

[Source: al-Kafi, Vol. 1, Ch. 122, Hadith. 8]

Hadith 3:

أَبُو هَاشِمٍ قَالَ سَمِعْتُ أَبَا مُحَمَّدٍ يَقُولُ‌ إِنَّ فِي الْجَنَّةِ بَاباً يُقَالُ لَهُ الْمَعْرُوفُ لَا يَدْخُلُهُ إِلَّا أَهْلُ بَيْتِ الْمَعْرُوفِ فَحَمِدْتُ اللَّهَ تَعَالَى فِي نَفْسِي وَ فَرِحْتُ مِمَّا أَتَكَلَّفُهُ مِنْ حَوَائِجِ النَّاسِ فَنَظَرَ إِلَيَّ أَبُو مُحَمَّدٍ ع فَقَالَ نَعَمْ قَدْ عَلِمْتُ مَا أَنْتَ عَلَيْهِ وَ أَنَّ أَهْلَ الْمَعْرُوفِ فِي الدُّنْيَا أَهْلُ الْمَعْرُوفِ فِي الْآخِرَةِ جَعَلَكَ اللَّهُ مِنْهُمْ يَا أَبَا هَاشِمٍ وَ رَحِمَكَ

Narrated from Abu Hashim that Abu Muhammad Imam Hasan Askari (عليه السلام) said,

"There is a gate in Heaven called al-Maroof (Kindness), and no one will enter it except the people of kindness."

I (i.e. Abu Hashim, the narrator) thanked Allah within myself and rejoiced for what I had taken upon myself of fulfilling the needs of the people.

Abu Muhammad Imam Hasan al-Askari (عليه السلام) looked at me and said, "Yes I know of what you do. And surely the people of kindness in this world will also be known as the people of kindness in the hearafter. May Allah make you amongst them and have mercy upon you O Abu Hashim."

[Source: al-Manaqib, ibn Shahr Ashoob, Vol. 4, Pg. 432]

Hadith 4:

حدثنا علي بن عبد الله الوراق قال: حدثنا سعد بن عبد الله قال: حدثني موسى بن جعفر بن وهب البغدادي أنه خرج من أبي محمد عليه السلام توقيع: " زعموا أنهم يريدون قتلي ليقطعوا هذا النسل وقد كذب الله عز وجل قولهم والحمد لله

Narrated by Musa bin Jafar bin Wahab al-Baghdadi that the following letter (Tawqee) came from Abu Muhammad Imam Hasan Askari (عليه السلام)"

"They thought that they wanted to kill me in order to cut off this offspring (i.e. Imamat), and surely Allah (عز وجل) has disproved what they said, and all praise be to Allah."

[Source: Kamal al-Deen, Shaikh Sadooq, Vol. 1, Pg. 435]