any website that allows “raw” text data. An example would be pastebin.com or gist.github.com (though in the github case that might be against their terms of use). So for pastebin just add prepend /raw before the unique paste id. e.g. https://pastebin.com/raw/secbgjPx
If you need to have multiple pieces of text that can be called upon randomly or something like that, it is possible to use Ehsankia’s quote api as a system for text.