Surah Ali 'Imran 3:78

وَإِنَّ مِنْهُمْ لَفَرِيقًا يَلْوُۥنَ أَلْسِنَتَهُم بِٱلْكِتَـٰبِ لِتَحْسَبُوهُ مِنَ ٱلْكِتَـٰبِ وَمَا هُوَ مِنَ ٱلْكِتَـٰبِ وَيَقُولُونَ هُوَ مِنْ عِندِ ٱللَّهِ وَمَا هُوَ مِنْ عِندِ ٱللَّهِ وَيَقُولُونَ عَلَى ٱللَّهِ ٱلْكَذِبَ وَهُمْ يَعْلَمُونَ

And indeed, there is among them a party who alter the Scripture with their tongues so you may think it is from the Scripture, but it is not from the Scripture. And they say, "This is from Allāh," but it is not from Allāh. And they speak untruth about Allāh while they know.

Translation: Saheeh International

Tafsir

And there is a group a party of them the People of the Scripture like Ka‘b b. al-Ashraf who twist their tongues with the Book altering it by reciting it not according to the way in which it was revealed but according to the way in which they have distorted it as in the case of the descriptions of the Prophet s and …

Excerpt from Tafsir al-Jalalayn, commentary on 3:78, via Quran.com. The reader has the full commentary and 9 more tafsirs.