Question

What poetic device found commonly in the psalms and proverbs is also found in the beatitudes? a0?

Answer 1

I believe the poetic device is parallelism
Parallelism is a literary device in which parts of the sentence are grammatically the same, or similar in construction. It may be a word, a phrase, or an entire sentence repeated. This technique adds symmetry, effectiveness and balance to the written piece. It is important as it allows the writer to achieve a sense of rhythm and order. 

Answer 2

Answer:

Chiasmus

Explanation:

This is a poetic device  in which two or more clauses are related to each other through the reversal of the lines of a poetic structure in order to make a larger point.  

Example:

Isaiah 6:10,

"Make the heart of this people dull, and their ears heavy, and shut their eyes;

(Reversal of the lines) :

Lest they see with their eyes, and hear with their ears, and understand with their heart, and return and be healed.”

Psalms, proverbs and beatitudes; and most of Bible books use this figure.