وَتَٱللَّهِ لَأَكِيدَنَّ أَصْنَـٰمَكُم بَعْدَ أَن تُوَلُّوا۟ مُدْبِرِينَ
Wa tallaahi la akeedanna asnaamakum ba'da an tuwalloo mudbireen
By God I shall certainly plot against your idols as soon as you have turned your backs!’
And by God, I will scheme against your idols once you have turned your backs and gone.