Sahih Muslim
The Book of Clothes and Adornment — Hadith #5412
Scholarly Consensus: Sahih How we grade
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ هِشَامِ بْنِ زَيْدٍ،
قَالَ سَمِعْتُ أَنَسًا، يُحَدِّثُ أَنَّ أُمَّهُ، حِينَ وَلَدَتِ انْطَلَقُوا بِالصَّبِيِّ إِلَى النَّبِيِّ صلى الله عليه وسلم
يُحَنِّكُهُ قَالَ فَإِذَا النَّبِيُّ صلى الله عليه وسلم فِي مِرْبَدٍ يَسِمُ غَنَمًا . قَالَ شُعْبَةُ وَأَكْثَرُ عِلْمِي
أَنَّهُ قَالَ فِي آذَانِهَا .
So far as I know (he was cauterising) their ears.
Chain of Narration (Isnad)
Hadith Grading
Each grade below reflects one scholar's assessment of the chain of transmission. The grade describes the chain, not the Prophet's words. How we grade
Scholarly Consensus: Sahih