قَالَ أَوْسَطُهُمْ
...
The Awsat among them said,
Ibn `Abbas, Mujahid, Sa`id bin Jubayr, Ikrimah, Muhammad bin Ka`b, Ar-Rabi` bin Anas, Ad-Dahhak and Qatadah all said,
"This means the most just of them and the best of them."
...
أَلَمْ أَقُل لَّكُمْ لَوْلاَ تُسَبِّحُونَ
Did I not tell you, `Why do you not Tusabbihun?'
Mujahid, As-Suddi and Ibn Jurayj all said that,
لَّكُمْ لَوْلاَ تُسَبِّحُونَ
Why do you not Tusabbihun, this means
"why do you not say, `If Allah wills"'
As-Suddi said,
"Their making exception due to the will of Allah in that time was by glorifying Allah (Tasbih)."
Ibn Jarir said,
"It is a person's saying, `If Allah wills."'
It has also been said that it means that the best of them said to them,
"Did I not tell you, why don't you glorify Allah and thank Him for what He has given you and favored you with"
قَالُوا سُبْحَانَ رَبِّنَا إِنَّا كُنَّا ظَالِمِينَ