إِنَّآ أَخْلَصْنَٰهُم بِخَالِصَةٍ ذِكْرَى ٱلدَّارِ
Indeed, We purified them with a pure [quality]: remembrance of the abode.
Roots in this verse: خ ل ص (xlS), ذ ك ر (*kr), د و ر (dwr)