What is the story of the Egyptian god Osiris and his role in mythology?

Osiris was an important god in ancient Egyptian religion and mythology, and was considered the god of the afterlife, death, resurrection, and fertility. According to the myth, Osiris was one of the first rulers of Egypt who established laws and taught the people how to farm. His brother, Seth, was jealous of his power and plotted to kill him. Seth managed to trick Osiris into getting into a coffin, which he then sealed and threw into the Nile River.

Osiris' wife, Isis, searched for his body and eventually found it in Byblos. She brought it back to Egypt and hid it in the swamps, but Seth found it and cut it into fourteen pieces, scattering them throughout Egypt. Isis again searched for the pieces, and with the help of her sister, Nephthys, and the god Thoth, she reassembled Osiris' body and used magic to bring him back to life. However, Osiris could no longer rule the living world and became the ruler of the dead in the underworld.

The story of Osiris is significant in Egyptian mythology as it represents the cycle of life, death, and rebirth. The annual flooding of the Nile River was seen as a symbol of Osiris' death and resurrection, and the god was associated with the growth and renewal of crops. The myth also had a moral message about the importance of obeying the law and the dangers of jealousy and ambition.