This reading has a form IV verb preceded by the time adverb idh (for past tense).
إِذَا دَبَرَ
idhā dabara
“when it departs” OR “when it succeeds (the day)”
This reading has a form I verb preceded by the time adverb idhā, which tends to describe a future conditional.
Shpjegim
These readings convey similar or complementary meanings [al-Mahdawi]. NB: they accord with the same skeletal text: in the original codices, the alif may be read as part of the word preceding or following.
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 convey similar or complementary meanings [al-Mahdawi]. NB: they accord with the same skeletal text: in the original codices, the alif may be read as part of the word preceding or following.