وَوَضَّؤُوهُ، وَلَا يُمَضْمَضُ وَلَا يُسْتَنْشَقُ
Translation: Then perform ablution for the deceased, but do not rinse the mouth or draw water into the nose.
The washing sequence begins with ablution, except that mouth rinsing and nasal rinsing are omitted, since a deceased person cannot expel the water. This is a deliberate difference from ablution of the living.