Al-Husayn ibn Ali was (sitting) in the lap of the Messenger of Allah ﷺ. 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.  

كَانَ الْحُسَيْنُ بْنُ عَلِيٍّ ؓ فِي حِجْرِ رَسُولِ اللَّهِ ﷺ فَبَالَ عَلَيْهِ فَقُلْتُ الْبَسْ ثَوْبًا وَأَعْطِنِي إِزَارَكَ حَتَّى أَغْسِلَهُ قَالَ إِنَّمَا يُغْسَلُ مِنْ بَوْلِ الأُنْثَى وَيُنْضَحُ مِنْ بَوْلِ الذَّكَرِ  

"Husain bin 'Ali urinated in the lap of the Prophet and I said: 'O Messenger of Allah, give me your garment and put on another garment.' He said: 'Water should be sprinkled on the urine of a baby boy, and the urine of a baby girl should be washed away.'"  

بَالَ الْحُسَيْنُ بْنُ عَلِيٍّ فِي حِجْرِ النَّبِيِّ ﷺ فَقُلْتُ يَا رَسُولَ اللَّهِ أَعْطِنِي ثَوْبَكَ وَالْبَسْ ثَوْبًا غَيْرَهُ فَقَالَ إِنَّمَا يُنْضَحُ مِنْ بَوْلِ الذَّكَرِ وَيُغْسَلُ مِنْ بَوْلِ الأُنْثَى  

"Husain bin 'Ali urinated in the lap of the Prophet and I said: 'O Messenger of Allah, give me your garment and put on another garment.' He said: 'Water should be sprinkled on the urine of a baby boy, and the urine of a baby girl should be washed away.'" (Using translation from Ibn Mājah 522)  

بَالَ الْحَسَنُ بْنُ عَلِيٍّ فِي حِجْرِ النَّبِيِّ ﷺ فَقُلْتُ اعْطِنِي ثَوْبَكَ وَالْبَسْ ثَوْبًا غَيْرَهُ فَقَالَ «إِنَّمَا يُغْسَلُ مِنْ بَوْلِ الْأُنْثَى وَيُنْضَحُ مِنْ بَوْلِ الذِّكْرِ»