Strange hands for shoveling coal?

Yesterday I used a Yiddish saying that I must have learned decades ago from my beloved aunt. None of my Yiddish-savvy friends had ever heard of it. It sounds like this: a vremde hint is git kolen te shaven. I think it pertains to the care of elderly people. Family should do that instead of hiring help - strange hands are good for shoveling coal. Is anyone out there aware of that expression?