It was narrated from 'Abdullah bin Buraidah that:
His father said: "The Prophet (ﷺ) was preaching, then Al-Hasan and Al-Husain came, wearing red shirts and stumbling in them. The Prophet (ﷺ) came down, interrupting himself, and picked them up, then he went back to the minbar and said: 'Allah has spoken the truth: Your wealth and your children are only a trial. I saw these two stumbling in their shirts and I could not continue until I had interrupted myself and picked them up.'" (IT)
App reference (IT): Book 14, Hadith 50 (IT)
English reference (IT): Vol. 2, Book 14, Hadith 1414 (IT)
Arabic reference (IT): Book 14, Hadith 1424 (IT)