«فَإِذَا هُوَ أَبُو زَيْدٍ»
And suddenly, it was Abū Zayd!
Idhā here marks a surprising discovery. The narrator first appreciates the visitor’s literary sophistication and only then discovers his identity: Abū Zayd al-Sarūjī, the recurring figure from the earlier maqāmāt.
The suspense depends on delaying his name. Readers encounter the guest’s words and manners before learning who he is.