Musnad Ahmad 1017:67

Zayd ibn al-Hubab narrated to us, Husayn ibn Waqid narrated to me, Abdullah ibn Buraydah narrated to me, he said: I heard my father saying: Indeed, the Messenger of Allah (peace and blessings of Allah be upon him) performed the *aqiqah* for al-Hasan and al-Husayn.