Sahih Muslim Book - 39, Hadith - 5765

قَالَ عُبَيْدُ اللهِ: وَأَخْبَرَتْنِي أَنَّ ابْنَهَا ذَاكَ بَالَ فِي حَجْرِ رَسُولِ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، فَدَعَا رَسُولُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِمَاءٍ فَنَضَحَهُ عَلَى بَوْلِهِ وَلَمْ يَغْسِلْهُ غَسْلاً.

‘Ubaidullah said: And she (Umm Qais bint Mihsan) narrated that that son of hers urinated in the lap of the Messenger of Allah (s.a.w). The Messenger of Allah (s.a.w) called for some water and her sprinkled it n the urine, and he did not wash it thoroughly.