The Messenger of Allah ﷺ died when I had just been circumcised.
حدثنا يعقوب حدثنا أبي عن محمد بن إسحاق حدثني الحجاج بن أرطاة عن عطاء بن أبي رباح قال سمعت
توفي رسول الله ﷺ وأنا ختين
No references are available.
Its isnad is sahih. In al-Isabah 4:90, it is stated that this hadith is in the Sahih, and it is probably in Sahih Muslim. See 2832.