It is narrated from Qaboos bin Mukhaariq that Husayn bin Ali (may Allah be pleased with them) was in the lap of the Messenger of Allah (peace and blessings be upon him), and he urinated on him. Umm al-Fadl (may Allah be pleased with her) said: O Messenger of Allah! Give me your garment so that I may wash it. The Messenger of Allah (peace and blessings be upon him) said: "Umm al-Fadl! The urine of a girl should be washed, and the urine of a boy should be sprinkled with water."
Hadith Referenceمسند اسحاق بن راهويه / كتاب الطهارة / 103
Hadith Takhrij«سنن ابوداود ، كتاب الطهارة ، باب بول الصبي يصيب الثوب ، رقم : 375 . سنن ابن ماجه ، كتاب الطهارة ، باب ماجاء فى بول الصبي ، رقم : 522 . قال الشيخ الالباني : حسن صحيح . مسند احمد : 339/6»
Lubabah bint al-Harith (may Allah be pleased with her) narrated: The Messenger of Allah (peace and blessings be upon him) took Husayn bin Ali (may Allah be pleased with them both) and seated him in his lap, and he urinated on him. So I said: O Messenger of Allah! Give me your lower garment so that I may wash it. The Prophet (peace and blessings be upon him) said: "The urine of a girl is washed, and water is sprinkled over the urine of a boy."
Hadith Referenceمسند اسحاق بن راهويه / كتاب الطهارة / 104