Homer ends up getting food poisoning from the Kwik-E-Mart in "Homer and Apu" and gets Apu fired.
Added:

The Simpsons Season 5 Episode 13 Quotes

(Apu sees Homer in the shower with a candy stuck in his chest)
Apu: What's that?
Homer: EhI like to leave it there.

Oh, stomach churning...bowels clenching...not much time...must finish.

</i> Homer