"All my life I have fought injustice and cruelty. But I am old now—my time is almost up. You shall be my succesor. Merely by speaking my name you can become the strongest and mightiest man in the world—
CAPTAIN MARVEL! Speak my name!”
And young Billy Batson shouted the Wizard’s name.
And the World’s Mightiest Mortal was born.
Whiz Comics #2 (Feb. 1940)