أَرْعَى الْجَارَ وَلَوْ جَارَ
I respect the neighbour even if he acts unjustly.
Al-jār / jāra sound almost identical, but the first is a noun meaning neighbour and the second is a verb meaning to act unjustly. The sentence claims that the neighbour's rights remain relevant even when that neighbour wrongs the speaker.
This is meaningful wordplay, not merely end rhyme. The conditional construction creates the ethical point; the sound repetition makes it striking. Grammar is essential to understanding why similar-looking expressions do not have the same function.