Sunan Abu Dawud
377
Sahih Muquf+2

Narrated Ali ibn AbuTalib: The urine of a female (child) should be washed and the urine of a male (child) should be sprinkled over until the age of eating

Sahih MuqufAl-Albani
Sahih MuqufMuhammad Muhyi Al-Din Abdul Hamid