صحیح ابن حبان
Ibn Hibban
كتاب الطهارة
Book of Purification
باب النجاسة وتطهيرها - ذكر الإباحة للمرء ترك غسل الثوب الذي أصابه بول الصبي المرضع الذي لم يطعم بعد
Impurity and its purification: Permitting not washing clothes soiled by the urine of a nursing infant who has not eaten food
1 hadith
Hadith 1372
Lady Aisha Siddiqa (may Allah be pleased with her) narrates: Children used to be brought to the Prophet Muhammad (peace be upon him). He would give them tahneek. A child was brought, and he urinated on the Prophet. The Prophet sprinkled water over it and did not wash that spot.