In which Disney film does a group of diamond mine laborers sing a jaunty ditty entitled "Heigh Ho"?

I know you got this one. The dwarfs' work song "Heigh Ho" is among the catchiest in the entire Disney oeuvre. Pick axes slung over their shoulders, marching in time down into the diamond mine, these happy little fellows truly whistle while they work. Can you still name all seven? It's Doc, Happy, Grumpy, Sneezy, Sleepy, Bashful and, of course, Dopey!

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