Abu Dawud
Purification (Kitab Al-Taharah)
Book Number: 001 / Hadith Number: 374
Narated By N/A : Umm Qais, daughter of Mihsan reported that she came to the Prophet (pbuh) with her little son who had not attained the age of eating food. The Apostle of Allah (pbuh) seated him in his lap, and he urinated on his clothe. He sent for water and sprayed it (over his clothe) and did not wash it.