وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُتْبَةَ بْنِ مَسْعُودٍ، عَنْ أُمِّ قَيْسٍ بِنْتِ مِحْصَنٍ، أَنَّهَا أَتَتْ بِابْنٍ لَهَا صَغِيرٍ لَمْ يَأْكُلِ الطَّعَامَ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فَأَجْلَسَهُ فِي حَجْرِهِ فَبَالَ عَلَى ثَوْبِهِ فَدَعَا رَسُولُ اللَّهِ بِمَاءٍ فَنَضَحَهُ وَلَمْ يَغْسِلْهُ ‏.‏

Yahya related to me from Malik from Ibn Shihab from Ubaydullahibn Abdullah ibn Utba ibn Masud from Umm Qays ibn Mihsan that shebrought a baby boy of hers who was not yet eating food to theMessenger of Allah, may Allah bless him and grant him peace, and hesat it in his arms and it urinated on his garment, so the Messenger ofAllah, may Allah bless him and grant him peace, called for some waterand sprinkled over it but did not wash it. Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 141
Web Ref:  Muwatta Imam Malik Book 2 Hadith 112