2:146
ٱلَّذِينَ ءَاتَيْنَـٰهُمُ ٱلْكِتَـٰبَ يَعْرِفُونَهُۥ كَمَا يَعْرِفُونَ أَبْنَآءَهُمْ ۖ وَإِنَّ فَرِيقًا مِّنْهُمْ لَيَكْتُمُونَ ٱلْحَقَّ وَهُمْ يَعْلَمُونَ
alladhīna ātaynāhumu l-kitāba yaʿrifūnahu kamā yaʿrifūna abnāahum wa-inna farīqan min'hum layaktumūna l-ḥaqa wahum yaʿlamūna
Those We gave Scripture know it as well as they know their own sons, but some of them hide the truth that they know.
Those to whom We gave the Scripture (Jews and Christians) recognise him (Muhammad صلى الله عليه وسلم or the Ka‘bah at Makkah) as they recognise their sons. But verily, a party of them conceal the truth while they know it - [i.e. the qualities of Muhammad صلى الله عليه وسلم which are written in the Taurât (Torah) and the Injeel (Gospel)].