Az-Zumar · 39:49

49. When a disbelieving man is afflicted by sickness, poverty etc. he calls out to Me to remove his affliction. Then when I bless him with health or wealth, the disbeliever says: Allah has only given me this because He knows that I deserve it. Actually it is a test and a means of luring him to his destruction. But most disbelievers do not know this and they are deceived by the blessings Allah gives them.