What is the grammatical analysis (اعراب) of the word "الناقة" (the she-camel) in His, the Almighty's, saying: {إِنَّا مُرْسِلُو النَّاقَةِ فِتْنَةً لَّهُمْ فَارْتَقِبْهُمْ وَاصْطَبِرْ} (Indeed, We are sending the she-camel as a trial for them, so watch them and be patient)?

The word (الناقة - the she-camel) in the verse is in the genitive case due to the annexation of the active participle (مرسلو - senders) to it. Here, the active participle is annexed to its object because it refers to the past. If an active participle refers to the past, it loses its governing power, as mentioned by Ibn Malik in his Alfiyyah and Ibn Aqil in his commentary.