The four sons of Horus were a group of four gods (Hapi, Imsety, Duamutef, and Qebehsenuef) in Egyptian religion, who were essentially the personifications of the four canopic jars, which accompanied mummified bodies. Since the heart was thought to embody the soul, it was left inside the body. The brain was thought only to be the origin of mucus, so it was reduced to liquid, syphoned off, and discarded. This left the stomach (and small intestines), liver, large intestines, and lungs, which were removed, embalmed and stored, each organ in its own jar.