Is it true that you re not supposed to ask for a recommendation letter from a professor you've only had once?

I want to apply for a scholarship and I need two recommendation letters, but one of them has to be from one of my business professors (the other professor is one I've had for 5 semester because it was a language class). The problem is, I've never had the same business professor twice for a class before (and at my school that is pretty common for a business major). My friends told me that I should only ask for a recommendation letter if I've had the professor more than once, but they are also in a really small department, in which it's common for them to have the same professor 3+ times.