I have only just learned that Arthur C Clarke invented (as well as communications satellites and his many other inventions) modern LLM text generators.

The story is The Steam-powered Word Processor, 1986, and includes:

A vicar bored with writing sermons, which he realised consisted of subsets of the same text rearranged in slightly different ways each week "... conceived a machine which would automatically reassemble massed of text in any desired order ...".

And to train it?

"Before the machine could be used, [he] was faced with the laborious task of punching not only the Bible but the whole of Cruden's Concordance on to Jaquard cards ..."