What are someone Else's words used in I have a dream speech?

In Martin Luther King Jr.'s "I Have a Dream" speech, he famously incorporates phrases and themes from various sources, including the Bible, the Declaration of Independence, and the United States Constitution. He references the idea of freedom and equality, echoing the foundational principles of American democracy. Additionally, King draws on the imagery of hope and justice, using the metaphor of a dream to unite his vision for a racially integrated and harmonious society. This blend of influences enhances the speech's emotional and rhetorical power.