Hadithcore
Mishkat al-Masabih, 4150

‘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.

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

References1 variant
In-Book Reference
Book 20, Hadith 85