It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that he met Sayyiduna Hasan bin Ali (may Allah be pleased with them both) and said: I saw the Messenger of Allah (peace and blessings be upon him) kiss your blessed stomach, so uncover the spot that the Messenger of Allah (peace and blessings be upon him) kissed so that I may kiss it too. The narrator said: So Hasan (may Allah be pleased with him) uncovered that spot (drawing the cloth back from his stomach), and he kissed it. This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Wahb Abu Juhayfah (may Allah be pleased with him) that he said: I saw the Messenger of Allah (peace and blessings be upon him), and Hasan bin Ali (may Allah be pleased with them both) resembled him (peace and blessings be upon him). This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it! And it has an authentic corroborating report (shahid):

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that among the children of Sayyiduna Ali (may Allah be pleased with him) there was none who resembled the Messenger of Allah (peace and blessings be upon him) more than Sayyiduna Hasan (may Allah be pleased with him).

It is narrated from Abdullah bin Ubayd bin Umayr that Sayyiduna Hasan bin Ali (may Allah be pleased with them both) performed Hajj 25 times on foot, while his fine riding camels (thoroughbred she-camels) were led along with him (without a rider).

It is narrated from Qatadah that Sayyidah Fatimah (may Allah be pleased with her) gave birth to Sayyiduna Hasan (may Allah be pleased with him) two years after the Battle of Uhud, and between the Battle of Uhud and the arrival of the Prophet (peace and blessings be upon him) in Madinah there was a span of two years, six months and fifteen days. Thus, according to the Hijri calendar, Hasan (may Allah be pleased with him) was born at 4 years, 6 months and 15 days.

It is narrated from Ibn Waqid that Abu Muhammad Sayyiduna Hasan bin Ali bin Abi Talib (may Allah be pleased with them both) died in Rabi' al-Awwal of the year 49 AH, and Sa'id bin al-As led his funeral prayer.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that he said: I have never ceased to love this man (Hasan, may Allah be pleased with him) ever since I saw the Messenger of Allah (peace and blessings be upon him) treat him as I saw. I saw Hasan in the lap of the Prophet (peace and blessings be upon him), putting his fingers into the blessed beard of the Prophet (peace and blessings be upon him), while the Prophet (peace and blessings be upon him) was putting his tongue into his mouth. Then he (peace and blessings be upon him) said: 'Allahumma inni uhibbuhu fa-ahibbahu' (O Allah, I love him, so love him too). This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sa'id bin Abi Sa'id al-Maqburi that he said: We were with Sayyiduna Abu Hurayrah (may Allah be pleased with him) when Sayyiduna Hasan bin Ali bin Abi Talib (may Allah be pleased with them both) came and gave the greeting of peace. We returned his greeting, but Sayyiduna Abu Hurayrah (may Allah be pleased with him) did not notice his arrival. We said to him: O Abu Hurayrah, this is Hasan bin Ali who has greeted us. So he hurried after him and said: "And upon you be peace, O my master." Then he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Indeed, he is a master (sayyid)." This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.

Sayyiduna Urwah bin al-Zubayr narrates from his father that the Messenger of Allah (peace and blessings be upon him) kissed Hasan (may Allah be pleased with him), hugged him to his chest and began to smell him. A man of the Ansar was sitting with him (peace and blessings be upon him), and the Ansari said: I have a son who has grown up, yet I have never kissed him. So the Messenger of Allah (peace and blessings be upon him) said: "What do you think: if Allah has removed mercy from your heart, what fault is that of mine?" This hadith has a sahih (authentic) chain on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he said: The Prophet (peace and blessings be upon him) came, carrying Sayyiduna Hasan bin Ali (may Allah be pleased with them both) on his shoulders. A man met him and said: O boy, what an excellent mount you are riding! The Messenger of Allah (peace and blessings be upon him) said: "And what an excellent rider he is!" This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.