Musannaf Ibn Abi Shayba 27:551

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, walking and stumbling and getting up. The Messenger of Allah (may Allah bless him and grant him peace) descended, took them, and placed them in front of him. Then he said: "Allah and His Messenger have spoken the truth: 'Your wealth and your children are but a trial.' I saw these two and I could not be patient." Then he resumed his sermon.