Al-Qasas 28:52

ٱلَّذِينَ ءَاتَيْنَـٰهُمُ ٱلْكِتَـٰبَ مِن قَبْلِهِۦ هُم بِهِۦ يُؤْمِنُونَ

Alladhīna ātaynāhumu l-kitāba min qablihi hum bihi yu'minūna

Those to whom We gave the Scripture before it - they are believers in it.