This is in the singular, referring to one of the gardens, as already in the previous ayah: jannatahū.
مِنْهُمَا
minhumā
“something even better there”
This is in the dual, referring to the two gardens.
Shpjegim:
These readings amount to the same meaning. The latter accords with the codices of Makkah, Madinah and the Levant with an additional mim to form the dual [Makki].
He has revealed to you ˹O Prophet˺ the Book in truth, confirming what came before it, as He revealed the Torah and the Gospel
Shpjegim:
These readings amount to the same meaning. The latter accords with the codices of Makkah, Madinah and the Levant with an additional mim to form the dual [Makki].