twrp-3.2.3-on7xeltedd.img (Note: The actual TWRP filename for J7 Prime often uses the codename on7xelte or on7xeltedd , not the literal “for-galaxy-j7-prime” string.)
But if you specifically need the text as you wrote it, that works as a readable label or search term. twrp-3.2.3-for-galaxy-j7-prime
Here’s a clean text assembly for that TWRP filename and device: twrp-3