Zal and the Simorgh
زال و سیمرغ
The baby was born with white hair, so his father left him on a mountain.

Sam, the greatest warrior in Iran, has a son born with hair as white as an old man's. Convinced it is a mark of demons and unable to face the court, he has the child carried up into the Alborz and left there.
The Simorgh is an enormous bird, ancient beyond reckoning, nesting on the highest peak. She hears the crying and comes down to take the baby for her chicks. Then she looks at him, and instead she raises him. He grows up on a mountaintop among birds, and learns everything she knows.
Years later Sam dreams of the son he abandoned and rides out to find him alive. The Simorgh gives Zal back without argument, and gives him her feathers: burn one, and she will come. Zal burns one twice in his life, and both times it saves someone he loves.
Why it matters
The tenderest thing in the poem, and the one that most reliably surprises new readers. An epic that opens on a thousand years of tyranny stops to spend a chapter on a bird deciding not to eat a baby. The Simorgh threads through everything afterward.