«إِنْ كَانَ يَكْفِيكَ نِصَابٌ مِنَ الْمَالِ أَلَفْنَاهُ لَكَ فِي الْحَالِ»
If a suitable amount of money will suffice you, we shall gather it for you immediately.
Here niṣāb is an adequate or specified amount of wealth; the literary usage need not be collapsed into the technical minimum for zakāt. Fī al-ḥāl means right now.
The listeners’ sympathy becomes a concrete offer of assistance. The remarkable narrative now has a material outcome, not merely admiring words or polite blessings.
Abū Zayd replies: «وَكَيْفَ لَا يُقْنِعُنِي نِصَابٌ»
How could such an amount not suffice me? He emphatically welcomes the offered support.