I said, "Mother of the Believers, tell me about the character of the Messenger of Allah ﷺ."She replied, "Do you not recite the Quran?"I said, "Yes, I do."She said, "The character of the Prophet of Allah ﷺ was the Quran." The hadith continues.
قلت يا أم المؤمنين أنبئيني عن خلق رسول الله ﷺ قالت: ألست تقرأ القرآن؟ قلت: بلى، قالت: فإن خلق نبي الله ﷺ كان القرآن. الحديث.
Muslim reported it in the book of the prayer of the traveler (139:746), from Muhammad bin Muthanna Anazi, who said, Muhammad bin Abu Adi told us, from Saeed, from Qatada, from Zurara, that Saad bin Hisham bin Amir came to Ayesha and asked her, and he mentioned the hadith in a long passage.