It was narrated that Abu Hurairah said:
"The Messenger of Allah said: 'Whoever loves Hasan and Husain, loves me; and whoever hates them, hates me.'" (JA)
English reference (JA): Vol. 1, Book 1, Hadith 143 (JA)
Arabic reference (JA): Book 1, Hadith 148 (JA)