I was listening to Christine Hayes’ fine lectures on the Hebrew Bible today (you can download them at Open Yale) and she was talking about leitwort, the technique of word repetition that is key device biblical writers used. E.g. She made reference to the seven repetitions of “…it was good.” It turns out Martin Buber coined the term. Here is his definition. It’s crucial, I think, to see that he describes the effect of the repetition in physical terms, as “movement.” This is obviously a very useful device in any kind of writing.