I built my hut near the Congo and it lulled me to sleep.
I looked upon the Nile and raised the pyramids above it.
I heard the singing of the Mississippi

from Langston Hughes – The Negro Speaks of Rivers on Rap Genius

Meaning

Langston Hughes is following the path taken by civilisation, from the Euphrates of the Ancient Mesopotamia, the dawn of civilisation to the flow of the African people in the Congo to the diaspora of the Africans to the United States

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