Example in the Quran

وَمِنَ ٱلنَّاسِ مَن يَقُولُ ءَامَنَّا بِٱللَّهِ وَبِٱلۡيَوۡمِ ٱلۡأٓخِرِ وَمَا هُم بِمُؤۡمِنِينَ

And there are some who say, “We believe in Allah and the Last Day,” yet they are not ˹true˺ believers.