فُرْسَانِ الْبَرَاعَةِ وَأَرْبَابِ الْيَرَاعَةِ
Horsemen of excellence and masters of the pen.
Fursān al-barāʿah / arbāb al-yarāʿah are balanced genitive phrases: knights of skill and masters of the pen. The near-rhyme between the two final nouns gives the description a stately cadence suitable for a discussion of eloquence.
These are metaphors, not claims about actual horsemanship or legal ownership. The parallel structure presents complementary literary abilities—accomplishment and command of writing—as an audience worth challenging.