Qur'an 2:8

وَمِنَ ٱلنَّاسِ مَن يَقُولُ ءَامَنَّا بِٱللَّهِ وَبِٱلْيَوْمِ ٱلْـَٔاخِرِ وَمَا هُم بِمُؤْمِنِينَ

“And of the people are some who say, "We believe in Allāh and the Last Day," but they are not believers.”

Al-Baqara 2:8 · Saheeh International