satrasekhem:

From the New Kingdom onward, the Sons of Horus formed part of a group of seven star gods who helped Anubis to protect the body of Osiris. In the Book of the Dead, the Sons are present when the dead are judged before Osiris. They were often shown standing on a blue lotus, like a fourfold version of the infant sun god who emerged from the primeval lotus. The four sons came to be regarded as powerful protectors for all the dead. Pallbearers at funerals played the roles of the Sons of Horus carrying the corpse of Osiris. The Sons were often named or shown on coffins and canopic chests, paired with the four protective goddesses: Isis, Nephthys, Neith, and Serqet. The heads of the four sons formed the stoppers for sets of canopic jars. If the internal organs were returned to a mummy, figures of the Sons of Horus were seen to the mummy wrappings or placed inside the body cavity. Their function was to prevent any parts of the body being lost. The terrible fate of the body of Osiris was never to be repeated.

Egyptian Mythology, A Guide to the Gods, Godddesses and Traditions of Ancient Egypt by Geraldine Pinch