Interesting. That is the same phrase as in Yedid Nefesh. But in Tehilim it is not the end of a sentence like in Yedid Nefesh and Devorim. Though Devorim is a different form of the word.
The rhyming scheme is an interesting “proof” of how it should be read but there are some piyyutim (in slichos I think) where the Artscroll tells us to pronounce it as the correct Hebrew rather than in the form of the poem so this is not necessarily a solid proof.