The Messenger of Allah ﷺ said, "Hasan and Husayn are the masters of the youth of Paradise."Sufyan bin Waki narrated to us, Jareer and Muhammad bin Fudayl narrated to us from Yazid something similar.
حدثنا محمود بن غيلان حدثنا أبو داود الحفري عن سفيان عن يزيد بن أبي زياد عن ابن أبي نعم
قال رسول الله ﷺ الحسن والحسين سيدا شباب أهل الجنة حدثنا سفيان بن وكيع حدثنا جرير ومحمد بن فضيل عن يزيد نحوه
Takhrij, [sahih] Ahmad also narrated it (62/3) from the hadith of Sufyan Thawri through this route, and Khalid bin Abdullah followed him in narrating it (Ahmad 64/3). Yazid bin Abu Ziyad was followed by Hakam bin Abdul-Rahman, as Nasai narrated in Kubra (no. 8169), and by Yazid bin Mardanbah (Ahmad 3/3). The hadith has hasan corroborating narrations with Hakim (3/167) and others.