Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
muslim:2147Abū Bakr b. Abū Shaybah > ʿAbdullāh b. Numayr > Hishām / Ibn ʿUrwah from his father > ʿĀʾishah

'A'isha reported that the new-born infants were brought to Messenger of Allah ﷺ. He blessed them and rubbed their palates with dates.  

مسلم:٢١٤٧حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ حَدَّثَنَا هِشَامٌ يَعْنِي ابْنَ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُؤْتَى بِالصِّبْيَانِ فَيُبَرِّكُ عَلَيْهِمْ وَيُحَنِّكُهُمْ