Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) said regarding the urine of a nursing infant: "The urine of a baby girl should be washed, and the urine of a baby boy should be sprinkled."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4158
Hadith Gradingمحدثین:صحيح
Hadith Takhrij«صحيح۔ احمد 1/76/563، ابن خزيمه 284»