Al Hajj Ayah 11

وَمِنَ ٱلنَّاسِ مَن يَعْبُدُ ٱللَّهَ عَلَىٰ حَرْفٍ‌ۖ فَإِنْ أَصَابَهُۥ خَيْرٌ ٱطْمَأَنَّ بِهِۦ‌ۖ وَإِنْ أَصَابَتْهُ فِتْنَةٌ ٱنقَلَبَ عَلَىٰ وَجْهِهِۦ خَسِرَ ٱلدُّنْيَا وَٱلْأَخِرَةَ‌ۚ ذَٲلِكَ هُوَ ٱلْخُسْرَانُ ٱلْمُبِينُ ١١ And there are some who worship Allah on the verge ?of faith?: if they are blessed with something good, they are content with it; but if they are afflicted with a trial, they relapse ?into disbelief?, losing this world and the Hereafter. That is ?truly? the clearest loss.