The Ruling on Washing the Dead

Question:
Are there texts that encourage washing the dead, and what is the reward?

Answer:
I do not recall specific texts right now, but it is well known that washing the dead is a collective obligation (fard kifayah) that is obligatory upon the Muslims. They must wash the dead, shroud them, and pray over them. It is a collective obligation that is necessary and well known from the general texts regarding the rights of a Muslim over another Muslim, and that it is not permissible for people to leave their dead without washing them. Yes.
And shrouding them is also a collective obligation. It is obligatory upon the entire community to wash the dead. If one person washes him, the sin falls off the rest. They must pray over the dead, and they must shroud him. If some of them shroud him, the obligation falls off the dead, otherwise the entire community sins. These are collective obligations. It is obligatory upon the community to pray over the dead, shroud him, and wash him. If some of them perform these acts, the obligation is fulfilled. If they leave a dead person to be neither washed nor prayed over, all of them sin. Everyone who knows about it sins. If some of them wash him, or some pray over him, or some shroud him, they have fulfilled the obligation and the sin falls off the rest.