Musannaf Ibn Abi Shayba 1:1288

Abu al-Ahwas narrated to us, from Simak, from Qabus ibn al-Mukhariq, from Lubaba bint al-Harith, who said: Al-Husayn ibn Ali urinated on the lap of the Prophet, may Allah bless him and grant him peace. I said, "O Messenger of Allah, give me your garment and wear another one." He said, "Water is merely sprinkled over the urine of a male, while the urine of a female is washed."