Abdullah bin Buraidah narrates from his father: Once, the Prophet Muhammad (peace be upon him) was delivering a sermon. During this, Sayyiduna Imam Hasan and Sayyiduna Imam Husain (may Allah be pleased with them), who were children, came wearing red shirts. They would sometimes fall and sometimes stand up. The Prophet Muhammad (peace be upon him) came down from the pulpit for both of them, took hold of them, and said (the command of Allah Almighty is): "Indeed, your wealth and your children are a trial."
Hadith Referenceصحیح ابن حبان / كتاب الفرائض / 6038
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما بعده.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده حسن