Abu Saeed Khudri reported,
The Messenger of Allah ﷺ said, "Hasan and Husayn are the masters of the youth of Paradise, except for the two cousins, Yahya and Isa, peace be upon them."
Azami 8472
Hasanعن أبي سعيد قال
قال رسول الله ﷺ: الحسن والحسين سيدا شباب أهل الجنة إلا ابني الخالة: يحيى وعيسى عليهما السلام.
Tabarani related it in Al-Kabir (3/28), Ibn Hibban (6959), and Hakim (3/166–167), all of them through routes from Hakam bin Abdul-Rahman bin Abu Naim, from his father, from Abu Saeed Khudri, who mentioned it. Hakim said, "This is a hadith that has been established as sahih through many routes, and I am astonished that the two of them did not include it." Dhahabi followed up on this, saying, "There is weakness in Hakam." I say, its chain is hasan due to the discussion surrounding Hakam bin Abdul-Rahman, except that his hadith is hasan. His statement, "Hasan and Husayn are the two leaders of the youth of Paradise," is recorded in the virtues of the companions.