Al-Hajj (22:11)
وَمِنَ ٱلنَّاسِ مَن یَعۡبُدُ ٱللَّهَ عَلَىٰ حَرۡفࣲۖ فَإِنۡ أَصَابَهُۥ خَیۡرٌ ٱطۡمَأَنَّ بِهِۦۖ وَإِنۡ أَصَابَتۡهُ فِتۡنَةٌ ٱنقَلَبَ عَلَىٰ وَجۡهِهِۦ خَسِرَ ٱلدُّنۡیَا وَٱلۡـَٔاخِرَةَۚ ذَ ٰلِكَ هُوَ ٱلۡخُسۡرَانُ ٱلۡمُبِینُ
And among mankind is he who worshippeth Allah upon a narrow marge so that if good befalleth him he is content therewith, but if a trial befalleth him, he falleth away utterly. He loseth both the world and the Hereafter. That is the sheer loss.
— Mohammed Marmaduke William Pickthall
Wa minan naasi mai ya'budul laaha 'alaa harfin fa in asaabahoo khairunit maanna bihee wa in asaabat hu fitnatunin qalaba 'alaa wajhihee khasirad dunyaa wal aakhirah; zaalika huwal khusraanul mubeen