Mishkat al-Masabih 20 Game and Animals Which May Be Slaughtered كتاب الصيد والذبائح 85

وَعَنْ عَائِشَةَ: أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يُؤْتَى بِالصِّبْيَانِ فَيُبَرِّكُ عَلَيْهِمْ وَيُحَنِّكُهُمْ. رَوَاهُ مُسلم

‘A’isha told that boys used to be brought to God’s messenger, and he would invoke blessings on them and soften some dates and rub their palates with them. Muslim transmitted it.