I'm searching for documentation that shows that Islam actively taught the earth was flat, immovable, not globe etc.

I've read the Quran passages that infer it,  but I can't find anything other than that, or some fairly recent looking video of a Muslim talking about it (airplane taking off / landing). There are newspaper articles from the 19th century that refer to it, but these are from US archives and I couldn't find anything other than the mention of the belief.

Any links much appreciated.