Generally speaking, of course, about those civilizations that would have seen it regularly. Viking, Ancient Roman via the British Isles, or maybe turn-of-the-millennia Russia, anything at all? What was the nature of the text?
hi! there's lots of room for more input on this question, but here are a few previous threads to get you started
What did people think the northern lights were before science explained it?
What did ancient societies and nomadic groups think when seeing Aurora Borealis?
How have people tried to explain the northern lights through the ages?