Sunan Abi Dawud, Book 1, Hadith 375 (USC-MSA) ⓘ
Narrated Lubabah daughter of al-Harith: Al-Husayn ibn Ali was (sitting) in the lap of the Messenger of Allah. He passed water on him. I said: Put on (another) clothe, and give me your wrapper to wash. He said: The urine of a female child should be washed (thoroughly) and the urine of a male child should be sprinkled over.
حَدَّثَنَا مُسَدَّدُ بْنُ مُسَرْهَدٍ، وَالرَّبِيعُ بْنُ نَافِعٍ أَبُو تَوْبَةَ، - الْمَعْنَى - قَالاَ حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ سِمَاكٍ، عَنْ قَابُوسَ، عَنْ لُبَابَةَ بِنْتِ الْحَارِثِ، قَالَتْ كَانَ الْحُسَيْنُ بْنُ عَلِيٍّ - رضى الله عنه - فِي حِجْرِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَبَالَ عَلَيْهِ فَقُلْتُ الْبَسْ ثَوْبًا وَأَعْطِنِي إِزَارَكَ حَتَّى أَغْسِلَهُ قَالَ " إِنَّمَا يُغْسَلُ مِنْ بَوْلِ الأُنْثَى وَيُنْضَحُ مِنْ بَوْلِ الذَّكَرِ " .
also referenced under: Hadith 375 (DarusSalam) & Hadith 375 (Hasan)