The Messenger of Allah ﷺ said about Hasan and Husayn, "O Allah, I love them, so love them."
قال رسول الله ﷺ للحسن والحسين: اللهم إني أحبهما فأحبهما.
Ahmad (9759), Bazzar (9736), and Tabarani in Al-Kabir (3/42) all narrated it through routes from Abu Hazim (whose name is Salman Ashjai), from Abu Hurairah, who said, and then he related it.Tabarani added at the end of the hadith, "and hate whoever hates them both."Its isnad is sahih.