Which rhetorical device is used in this statement from Dr. Martin Luther King Jr. and speech and ldquoI Have a Dream and rdquo?

The statement "I Have a Dream that one day this nation will rise up and live out the true meaning of its creed: We hold these truths to be self-evident, that all men are created equal." uses an example of anaphora, with the repetition of the phrase "I have a dream" for emphasis and to inspire the audience.