Musannaf Ibn Abi Shayba 16:499

Abu Bakr narrated to us, he said: Zayd ibn al-Hubab narrated to us, he said: Husayn ibn Waqid narrated to me, he said: Abdullah ibn Buraydah narrated to me, from his father, who said: The Messenger of Allah (may Allah bless him and grant him peace) was delivering a sermon to us, when al-Hasan and al-Husayn approached, wearing two red shirts.