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."
Sahih al-Bukhari Book 62, Hadith 91