Al-Sari ibn Yahya said: “Al-Hasan used to fast the three ‘white’ days (the 13th, 14th and 15th of each lunar month), the sacred months, and every Monday and Thursday (1).

Yunus ibn ʿUbayd, reporting from al-Hasan, related:
“We used to frequent the Companions of the Messenger of Allah ﷺ (2).”

Ghalib al-Qattan, on the authority of Bakr ibn ʿAbd Allah al-Muzani, said:
“If anyone wants to look at the most knowledgeable jurist we have ever met, let him look at al-Hasan.”

Qatādah said: “Al-Hasan was among the people most learned in what is lawful and unlawful (3).”

Abu ʿUbayd al-Ājurrī narrated from Abu Dawud, who said:
“Al-Hasan performed only two pilgrimages, for he used to stay in Khurasan. He would travel with men such as Qaṭarī ibn al-Fujāʾah and al-Muhallab ibn Abi Ṣufrah, and he was counted among the brave.”

Hisham ibn Ḥassān said: “Al-Hasan was the bravest man of his time.”

Abu ʿAmr ibn al-ʿAlāʾ said: “I have never seen anyone more eloquent than al-Hasan and al-Ḥajjāj.”

Fudayl ibn ʿIyāḍ, through an unnamed narrator, reported from al-Hasan:
“Paradise has never been adorned for any community as it has been adorned for this community, yet you do not see a single lover of it.”

Abu ʿUbaydah al-Nāji, on the authority of al-Hasan, said:
“O son of Adam, abandoning the sin in the first place is easier for you than struggling to repent afterwards. What makes you feel safe that you have not committed a grave sin for which the gate of repentance has been closed, leaving you with nothing to do? (4)"