22:11
وَمِنَ ٱلنَّاسِ مَن يَعْبُدُ ٱللَّهَ عَلَىٰ حَرْفٍۢ ۖ فَإِنْ أَصَابَهُۥ خَيْرٌ ٱطْمَأَنَّ بِهِۦ ۖ وَإِنْ أَصَابَتْهُ فِتْنَةٌ ٱنقَلَبَ عَلَىٰ وَجْهِهِۦ خَسِرَ ٱلدُّنْيَا وَٱلْءَاخِرَةَ ۚ ذَٰلِكَ هُوَ ٱلْخُسْرَانُ ٱلْمُبِينُ
And of the people is he who worships Allah on an edge. If he is touched by good, he is reassured by it; but if he is struck by trial, he turns on his face [to the other direction]. He has lost [this] world and the Hereafter. That is what is the manifest loss.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The meaning of worshipping Allah as it were upon the edge
Mujahid, Qatadah and others said:
عَلَى حَرْفٍ
(upon the edge) means, in doubt. Others said that it meant on the edge, such as on the edge or side of a mountain, i.e., (this person) enters Islam on the edge, and if he finds what he likes he will continue, otherwise he will leave. Al-Bukhari recorded that Ibn `Abbas said:
وَمِنَ النَّاسِ مَن يَعْبُدُ اللَّهَ عَلَى حَرْفٍ
(And among mankind is he who worships Allah as it were upon the edge.) "People would come to Al-Madinah to declare their Islam and if their wives gave birth to sons and their mares gave birth to foals, they would say, `This is a good religion,' but if their wives and their mares did not give birth, they would say, `This is a bad religion."' Al-`Awfi reported that Ibn `Abbas said, "One of them would come to Al-Madinah, which was a land that was infected with a contagious disease. If he remained healthy there, and his mare foaled and his wife gave birth to a boy, he would be content, and would say, `I have not experienced anything but good since I started to follow this religion."