ثُمَّ إِنَّهُمْ لَصَالُوا۟ ٱلْجَحِيمِ ۝١٦ Why is the nūn absent from صَالُوا۟ here?

Surah Al-Mutaffifin — Part 3

• Because it is jussive
• Because it is accusative
• Because it is a perfect verb
• Because the plural active participle is annexed