Duamutef (Dwꜣ-mw.t⸗f), the jackal-headed son of Horus, protected the stomach of the deceased and was in turn protected by the goddess Neith. His name means literally “he who worships his mother”. In the Coffin Texts Horus calls upon him, “Come and worship my father N for me, just as you went that you might worship my mother Isis in your name Duamutef.”
In Spell 151 of the Book of the Dead Duamutef is given the following words to say: “I have come to rescue my father Osiris from his assailant .” Osiris is the mortal identity of Horus.
Duamutef through his obedience to his mother Isis has the power to protect the deceased Osiris from harm.
Duamutef was also considered one of the four pillars of Shu, a rudder of heaven. Duamutef’s role was to protect the stomach and upper intestines of the deceased and was the guardian of the East. The stomach was kept in a canopic jar after mummification. He collaborated with Anubis in the mummification of Anubis’s body and became patrons of the canopy vases.
Source: Ancient Egypt Duamutef – Facts About Ancient Egyptians (ancientegyptianfacts.com)