﴿ ٱلَّذِى جَعَلَ مَعَ ٱللَّهِ إِلَٰهًا ءَاخَرَ فَأَلْقِيَاهُ فِى ٱلْعَذَابِ ٱلشَّدِيدِ ﴾

“who has set up another deity beside God: cast him, then, cast him into suffering severe!””

who has set up alongside God another god! alladhī ja‘ala ma‘a’Llāhi ilāhan ākhara is the subject with an implicitly conditional import the predicate of which is the following. Cast him then into the severe chastisement’ the explanation of this dual form of the verb alqiyāhu ‘cast him’ is as above.