Sahih Muslim – Hadith No : 286

A’isha, the wife of the Apostle (may peace be upon him) said: Babies were brought to the Messenger of Allah (may peace be upon him) and he blessed them, and after having chewed (something, e. g. dates or any other sweet thing) he rubbed there with their soft palates. A baby was brought to him and he passed water over him (over his garment), so he asked water to be brought and sprinkled it, but he did not wash it.

Hadith In Arabic Text :

حدثنا أبو بكر بن أبي شيبة، وأبو كريب قالا حدثنا عبد الله بن نمير، حدثنا هشام، عن أبيه، عن عائشة، زوج النبي صلى الله عليه وسلم أن رسول الله صلى الله عليه وسلم كان يؤتى بالصبيان فيبرك عليهم ويحنكهم فأتي بصبي فبال عليه فدعا بماء فأتبعه بوله ولم يغسله ‏.‏

Chapter : The Book of Purification – كتاب الطهارة