They said, “Art thou the one that did this with our gods, O Abraham?”
They asked him the formal question. There was
no mystery about it. He had already openly threatened
to do something to the idols, and people who had heard
his threats were there. He now continues his ironic taunt
to the idol-worshippers.
‘You ask me! Why don’t you ask the idols?
Doesn’t it look as if this big fellow has smashed the
smaller ones in a quarrel?’
If they do not ask the idols, they confess that the idols
have not intelligence enough to answer! This argument is
developed in verses 64-67.
Note that while the false worshippers laughed at his
earnestness, he pays them out by a grim practical joke,
which at the same time advances the cause of Truth.
Yusuf Ali, Abdullah. Translation and Commentary of the Quran. (surah 21 verse 62). Quran Arabic with English Translation & Commentary (Tafsir) by Abdullah Yusuf Ali, Free Download (quran4u.com)