I spit out a line and rhymed "birthday" with "first place"
And we both had the same rhymes that sound alike
We was on the same shit, that Big Daddy Kane shit
With compound syllables sound combined

from Eminem – Yellow Brick Road Lyrics on Rap Genius

The line in question? the last line of “Still Don’t Give a Fuck”:

I don’t know why the fuck I’m here in the first place
My worst day on this earth was my first birthday

Eminem is the master of matching up vowel sounds (“assonance” in AP English parlance)

This was ‘89, the age of N.W.A., in which rap consisted of very simple rhyme schemes and flows and this kind of slant rhyme would have been pretty unusual. One of the only people doing this kind of stuff at the time was Big Daddy Kane

For example, on “Ain’t No Half-Steppin'” he rhymed

And, stepping to me, yo that’s the wrong move
So what you on, Hobbs, dope or dog food?

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