Narrated 'Ali bin Husain:
from his father, from his grandfather, 'Ali bin Abi Talib: "The Prophet (S) took Hasan and Husain by the hand and said: 'Whoever loves me and loves these two, and their father and mother, he shall be with me in my level on the Day of Judgement."
Narrated Usamah bin Zaid:
"I came to the Prophet (S) one night concerning some need, so the Prophet (S) came out while he was covering up something, and I did not know what it was. Once I had tended to my need, I said: 'What is this that you were covering up?' So he uncovered it, and I found it was Hasan and Husain [peace be upon them] upon his hips. So he said: 'These are my two sons, and the sons of my daughter. O Allah! Indeed, I love them, so love them, and love those who love them.'"
Narrated Ya'la bin Murrah:
that the Messenger of Allah (S) said: "Husain is from me, and I am from Husain. Allah loves whoever loves Husain. Husain is a Sibt among the Asbat." [Asbat, plural of Sibt: A great tribe. Meaning, Al-Husain would have many offspring, such that they would become a great tribe. And this has indeed occurred. See Tuhfat Al-Ahwadhi (4/341).]
Narrated Al-Bara:
that the Prophet (S) saw Hasan and Husain, so he said: "O Allah, I love them, so love them."
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.'"
It was narrated from Sa'eed bin Abu Rashid that Ya'la bin Murrah told them that:
They had gone out with the Prophet to a meal to which they had been invited, and Husain was there playing in the street. The Prophet came in front of the people and stretched out his hands, and the child started to run here and there. The Prophet made him laugh until he caught him, then he put one hand under his chin and the other on his head and kissed him, and said, "Husain is part of me and I am part of him. May Allah love those who love Husain. Husain is a tribe among tribes." (Hasan)(Another chain with similar meaning)