Tafsir of Al-Qalam 68:28

قال أوسطهم

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.''

ألم أقل لكم لوﻻ تسبحون

Did I not tell you, `Why do you not Tusabbihun?' Mujahid, As-Suddi and Ibn Jurayj all said that,

لكم لوﻻ تسبحون

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''

قالوا سبحان ربنا إنا كنا ظالمين