I had committed to memory, from many of our scholars in Madinah, that Muhammad bin Amr bin Hazm used to narrate hadith from Mughira, among them that he told him he heard the Prophet ﷺ say, "Whoever washes a deceased person should perform a complete bath."
حدثنا يعقوب حدثنا أبي
وقد كنت حفظت من كثير من علمائنا بالمدينة أن محمد بن عمرو بن حزم كان يروي عن المغيرة أحاديث منها أنه حدثه أنه سمع النبي ﷺ يقول من غسل ميتا فليغتسل
No references are available.
Its isnad is daif, it is disconnected, as Ibn Ishaq did not clearly state from whom he narrated his hadith. However, the hadith is sahih, and it has already appeared at 10264.