It is narrated from Hazrat Abu Saeed (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Hasan (may Allah be pleased with him) and Husain (may Allah be pleased with him) are the leaders of the youth of Paradise.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10999