«خِنَاقِ الْحَمَّارَهْ بِسَعْدِ الرُّكَّابْ»

The image is of men who rent out donkeys falling into a squabble, not a literal fight to the throat, and then outdoing each other in cutting the fare. The riders profit from this feud without joining it, since every price cut lands in their pocket.

Applied more widely, it observes that discord among those offering a service or goods tends to benefit the people they serve, as rivals undercut one another. It is about this third-party gain, not general pleasure in others' conflicts.

Suited to moments when competing sellers or service providers fall out and start undercutting each other, leaving customers or bystanders with better terms; it fits comments on price wars and rival traders.