Sayyiduna Usamah bin Zayd (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) would take me and Sayyiduna Husayn, and one of us would sit on his right thigh and the other on his left thigh, and he would say: "O Allah, I love them both, so love them."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2629