Surah 37. As-Saffat, Ayah 22

According to almost all of the earliest authorities - including 'Umar ibn al-Khattab, 'Abd Allah ibn Abbas, Qatadah, Mujahid, As Suddi, Said ibn Jubayr, Al-Hassan al-Basri, etc., - the expression azwaj denotes here "people resembling one another [in their dispositions]", or "people of the same kind" or "of the same ilk".

That is, if their wives were also wrong-doers. They are separately mentioned, because the Arabic phrase for "wrong-doers" is of the masculine gender. All the associates in wrong-doing will be marshalled together. There will be personal responsibility: neither husband nor wife can lay the blame on the other.