Full Idea
The Egyptians were the first to claim that the soul of a human being is immortal, and that each time the body dies the soul enters another creature just as it is being born.
Gist of Idea
The Egyptians were the first to say the soul is immortal and reincarnated
Source
Herodotus (The Histories [c.435 BCE], 2.123.2)
Book Reference
'The First Philosophers', ed/tr. Waterfield,Robin [OUP 2000], p.96