This is a command as a new sentence: the lam effects the jussive. *In the narration of Warsh from Nāfiʿ, this is realised together with the following word as yaḥkuma-hlu.
وَلِيَحْكُمَ
wa-li-yaḥkuma
“We gave him the Gospel…so that the people of the Gospel would judge…”
In this reading, the lam expresses purpose and effects the subjunctive.
Maelezo
These readings are complementary in meaning.
He has revealed to you ˹O Prophet˺ the Book in truth, confirming what came before it, as He revealed the Torah and the Gospel
Maelezo
These readings are complementary in meaning.