Example in the Quran

وَءَامِنُواْ بِمَآ أَنزَلۡتُ مُصَدِّقٗا لِّمَا مَعَكُمۡ وَلَا تَكُونُوٓاْ أَوَّلَ كَافِرِۭ بِهِۦۖ وَلَا تَشۡتَرُواْ بِـَٔايَٰتِي ثَمَنٗا قَلِيلٗا وَإِيَّٰيَ فَٱتَّقُونِ

Believe in My revelations which confirm your Scriptures. Do not be the first to deny them or trade them for a fleeting gain. And be mindful of Me.