It was narrated from Umm Qays bint Mihsan that she brought a small son of hers, who was not yet eating solid food, to the Messenger of Allah (blessings and peace of Allah be upon him). The Messenger of Allah (blessings and peace of Allah be upon him) sat the child in his lap, and the child urinated on his garment. So he called for water and sprinkled it [on the urine], and he did not wash it..
Commentary :
The Prophet (blessings and peace of Allah be upon him) used to pay attention to matters of purification and explain the rulings thereon, which included the method of purifying the urine of nursing infants.
In this hadith, the Sahabiyyah Umm Qays bint Mihsan (may Allah be pleased with her) narrates that she brought a small son of hers to the Messenger of Allah (blessings and peace of Allah be upon him). Her describing the child as not yet eating solid food indicates that the child was still breast-feeding. It was their custom to bring their children to the Prophet (blessings and peace of Allah be upon him) so that he could pray for them and bless them. The Prophet (blessings and peace of Allah be upon him) took the child from her and sat him in his lap, and the child urinated on his garment, but he did no more than sprinkle water on the garment, and he did not wash it. This is by way of making it easy to purify garments from the urine of breast-feeding infants who are not yet eating solid food. In other reports, it is proven that he sprinkled water over the urine of a boy, but washed the urine of a girl.
This hadith highlights the good attitude of the Prophet (blessings and peace of Allah be upon him), and how he comforted and uplifted adults by honouring their children and sitting them in his lap, and so on..