Answer:
Step-by-step explanation:
This is not a for sure answer, but Genesis is filled with things that could be considered poetry. Read Chapter 1, the creation story. "And God said that it was good." Isn't that poetic?
Ruth has many things that are frequently quoted. When she declares her love for Naomi is often spoken of. It defines Ruth and the antithesis defines ruthless.
Job is filled with poetry -- especially parallel construction.
Esther has quoted passages too, though certainly not as many as Ruth. When they sing of her beauty, there's lots to be said.
Ecclesiastes has many things often quoted. Read chapter 3 especially the beginning. It's very poetic.
I guess we are left with Leviticus which is mostly the law. I would think this is your answer, but don't hold me to it. I would look it up. Look it up as Leviticus as literature.