Jami` at-Tirmidhi 3774

Narrated Buraidah:"The Messenger of Allah (ﷺ) was delivering a Khutbah to us when Al-Hasan and Al-Husain [peace be upon them] came, wearing red shirts, walking and falling down. So the Messenger of Allah (ﷺ) descended from the Minbar and carried them, and placed them in front of him. Then he said: 'Allah spoke the Truth: Indeed, your wealth and your children are a trial (64:15). I looked at these two children walking and falling down, and I could not bear patiently anymore until I interrupted my talk and picked them up