«يَا رُوَاةَ الْقَرِيضِ وَأُسَاةَ الْقَرِيضِ»
O transmitters of poetry and physicians of poetry!
Qarīḍ means poetry. Ruwāt are reciters and transmitters, while usāt evokes physicians or healers: critics are imagined as treating deficiencies in verse.
The paired forms add rhythm and a pointed courtesy. By naming the gathering as authorities on poetry, the stranger invites them to judge his performance, while subtly suggesting they should exercise that expertise fairly.