﴿ قَالُوا۟ نَعْبُدُ أَصْنَامًۭا فَنَظَلُّ لَهَا عَٰكِفِينَ ﴾

“They answered: We worship idols, and we remain ever devoted to them.””

They said ‘We worship idols — they reiterate the verb in the response in order to supplement it with the following remark — and remain cleaving to them’ we remain worshipping them all day; they give a longer response to indicate their misplaced pride in such an act.