Egyptian fraction have been called "Horus-Eye fractions" after a theory (now discredited) that they were based on the parts of the Eye of Horus symbol. They were used in the Middle Kingdom in conjunction with the later notation for Egyptian fractions to subdivide a hekat, the primary ancient Egyptian volume measure for grain, bread, and other small quantities of volume, as described in the Akhmim Wooden Tablet. If any remainder was left after expressing a quantity in Eye of Horus fractions of a hekat, the remainder was written using the usual Egyptian fraction notation as multiples of a "ro", a unit equal
Four sons of Horus of Osiris. Either way, Duamutef through his worship of Isis has the power to protect the deceased from harm. Duamutef was also considered one of the four pillars of Shu, a rudder of heaven, and was associated with the east. Qebehsenuef was the falcon-headed son of Horus, and protected the intestines of the deceased. He was in turn protected by the goddess Serket. It appears that his role was to refresh the dead person, and his name means literally "he who libates his siblings". Horus commands him, "Come refresh my father; betake yourself to him in your name of Qebehsenuef.