إِنَّمَا ٱلۡمُؤۡمِنُونَ ٱلَّذِينَ ءَامَنُواْ بِٱللَّهِ وَرَسُولِهِۦ ثُمَّ لَمۡ يَرۡتَابُواْ وَجَٰهَدُواْ بِأَمۡوَٰلِهِمۡ وَأَنفُسِهِمۡ فِي سَبِيلِ ٱللَّهِۚ أُوْلَٰٓئِكَ هُمُ ٱلصَّٰدِقُونَ

Innamal muu'minoonal lazeena aamanoo billaahi wa Rasoolihee summa lam yartaaboo wa jaahadoo biamwaalihim wa anfusihim fee sabeelil laah; ulaaaika humus saadiqoon

Only those are Believers who have believed in Allah and His Messenger, and have never since doubted, but have striven with their belongings and their persons in the Cause of Allah: Such are the sincere ones.

— Al-Hujurat (ٱلحُجُرَات), 49:15