(21) باب وَضْعِ الصَّبِيِّ فِي الْحِجْرِ
Narrated `Aisha:
The Prophet (ﷺ) took a child in his lap for Tahnik (i.e. he chewed a date in his mouth and put its juice in the mouth of the child). The child urinated on him, so he asked for water and poured it over the place of the urine.
Reference: Sahih al-Bukhari 6002
In-book reference: Book 78, Hadith 33
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 73, Hadith 31