Narrated Abu Bakra
I heard the Prophet (ﷺ) talking at the pulpit while Al-Hasan was sitting beside him, and he (i.e. the Prophet ) was once looking at the people and at another time Al-Hasan, and saying, "This son of mine is a Saiyid (i.e. chief) and perhaps Allah will bring about an agreement between two sects of the Muslims through him."
Narrated Usama bin Zaid
That the Prophet (ﷺ) used to take him and Al-Hasan, and used to say, "O Allah! I love them, so please love them," or said something similar.
Narrated Muhammad
Anas bin Malik said, "The head of Al-Husain was brought to 'Ubaidullah bin Ziyad and was put in a tray, and then Ibn Ziyad started playing with a stick at the nose and mouth of Al-Husain's head and saying something about his handsome features." Anas then said (to him), "Al-Husain resembled the Prophet more than the others did." Anas added, "His (i.e. Al-Husain's) hair was dyed with Wasma (i.e. a kind of plant used as a dye).
Narrated Al-Bara
I saw the Prophet (ﷺ) carrying Al-Hasan on his shoulder an saying, "O Allah! I love him, so please love him."
Narrated `Uqba bin Al-Harith
I saw Abu Bakr carrying Al-Hasan and saying, "Let my father be sacrificed for you; you resemble the Prophet and not `Ali," while `Ali was laughing at this.
Narrated Ibn `Umar
Abu Bakr used to say, "Please Muhammad (i.e. the Prophet) by doing good to his family."
Narrated Anas
None resembled the Prophet (ﷺ) more than Al-Hasan bin `Ali did.
Narrated Ibn Abi Nu'm
A person asked `Abdullah bin `Umar whether a Muslim could kill flies. I heard him saying (in reply). "The people of Iraq are asking about the killing of flies while they themselves murdered the son of the daughter of Allah's Messenger (ﷺ). The Prophet (ﷺ) said, They (i.e. Hasan and Husain) are my two sweet basils in this world."