Surah As Saffat Tafseer

But stop them, verily, they are to be questioned.

means, stop them so that they may be questioned about the things they did and said in this world.

As Ad-Dahhak said, narrating from Ibn Abbas, this means,

`detain them, for they are to be brought to account.'

Abdullah bin Al-Mubarak said, "I heard Uthman bin Za'idah say,

`The first thing about which a man will be asked is the company that he kept. Then by way of rebuke, it will be said to them:

مَا لَكُمْ لَاا تَنَاصَرُونَ