And that God may prove the believers…This means their being purified (takhlīṣ) from the blemishes of sins, just as they devoted themselves purely to Him (akhlaṣū lahu) in deed, which was [their] striving (jihād) in the way of God; …and efface the disbelievers. This means the destruction of the disbelievers through the affliction brought on by their sins.His words: