Al-An'am 6:53

وَكَذَٰلِكَ فَتَنَّا بَعْضَهُم بِبَعْضٍ لِّيَقُولُوٓا۟ أَهَـٰٓؤُلَآءِ مَنَّ ٱللَّهُ عَلَيْهِم مِّنۢ بَيْنِنَآ ۗ أَلَيْسَ ٱللَّهُ بِأَعْلَمَ بِٱلشَّـٰكِرِينَ

Wakadhālika fatannā baʿḍahum bibaʿḍin liyaqūlū ahāulāi manna l-lahu ʿalayhim min bayninā alaysa l-lahu bi-aʿlama bil-shākirīna

And thus We have tried some of them through others that they [i.e., the disbelievers] might say, "Is it these whom Allāh has favored among us?" Is not Allāh most knowing of those who are grateful?