وَتَاللَّهِ لَأَكِيدَنَّ أَصْنَامَكُم بَعْدَ أَن تُوَلُّوا مُدْبِرِينَ
[21:57]
And, by Allah! I will certainly do something against your idols after you go away, turning back.
"And by Allah, I have a plan for your idols - after ye go away and turn your backs"..
And, by Allah, I shall circumvent your idols after ye have gone away and turned your backs.