The Prophet ﷺ said, "Whoever washes a deceased person should perform a full bath."
حدثنا يحيى قال حدثنا ابن أبي ذئب قال حدثنا صالح مولى التوأمة
عن النبي ﷺ قال من غسل ميتا فليغتسل
No references are available.
Its isnad is sahih. Salih is Ibn Nabhan, the freed slave of Tawama, who became confused in his memory late in life, except that they said Ibn Abu Dhib's narration from him was before the confusion set in. The hadith has already appeared at 7757, and see also 9567.