The song was made famous by Paul Robeson whose voice, deep and resonant as it was, attained the status of the voice of God.
When Israel was in Egypt's land
Let my people go
Oppressed so hard they could not stand
Let my people go
Go down, Moses, way down in Egypt's land
Tell old Pharaoh, Let my people go
So Moses went to Egypt's land
Let my people go
To make old Pharaoh understand
Let my people go
Thus spake the Lord, bold Moses said,
"Let my people go,
If not, I'll strike your first born dead
Let my people go"
(Public Domain)