The Prophet ﷺ said about Hasan, "O Allah, I love him, so love him and love whoever loves him," and he pressed him close to his chest.
حدثنا أحمد بن عبدة أنبأنا سفيان بن عيينة عن عبيد الله بن أبي يزيد عن نافع بن جبير
عن النبي ﷺ قال للحسن اللهم إني أحبه فأحبه وأحب من يحبه قال وضمه إلى صدره
Bukhari narrated it in "Sales," chapter "What Has Been Mentioned Regarding the Markets," no. 2122, and Muslim in "The Virtues of the Companions," chapter "The Virtues of Husayn" , no. 2421, from the hadith of Sufyan through this same chain, both at length and in abridged form.