Isis and Ra's Secret Name: The Cure with a Condition
Isis creates the danger that only she can cure, compelling Ra to reveal a hidden name. The Egyptian account survives as part of healing incantations used against venomous bites and stings.

The account
Ra grows old, and his spittle falls to the earth. In the Egyptian account, Isis combines it with clay to form a snake and places the creature in his path. Its bite brings the sun god pain that his familiar powers cannot master. Isis can heal him, but she asks for what ordinary titles will not provide: his hidden name. The cure depends on a secret passing from one divine keeper to another.
Following the trail
UCL identifies this narrative as a Ramesside incantation for removing poison, preserved in several sources from Deir el-Medina. Turin's Papyrus Cat. 1993 contains a copy within a collection of protective spells against snakes and scorpions. Ra agrees that Isis may share the name only with Horus. These manuscripts establish an ancient religious healing tradition. The tale's secret name is not disclosed to the modern reader as a recovered password. Its purpose was to make the divine recovery relevant to a human sufferer.
Why it stays with us
Knowledge here is intimate enough to change the balance between gods. The story also has a practical setting: an afflicted person could hear a divine danger overcome in words while hoping for relief. Its power as narrative lies in making the vast sun god's vulnerability meet the immediate fear of a bite.