Deceit is in the heart ofthose who devise evil,
but those who plan peacehave joy.
In an inverted way, "deceit is in the heart of" almost parallels "have joy," and likewise, "those who devise evil" sort of parallels "those who plan peace." The opposite order in the structure (deceit | devise evil || plan peace | joy) matches these differences.
This structure is also in the Hebrew:
מִרְמָה בְּלֶב־חֹרְשֵׁי רָע וּֽלְיֹעֲצֵי שָׁלוֹם שִׂמְחָֽה׃
and in the Latin Vulgate:
dolus in cordecogitantium mala
qui autem ineunt pacis consiliasequitur eos gaudium