Surah Al-Ahqaf 46:12

وَمِن قَبْلِهِۦ كِتَـٰبُ مُوسَىٰٓ إِمَامًا وَرَحْمَةً ۚ وَهَـٰذَا كِتَـٰبٌ مُّصَدِّقٌ لِّسَانًا عَرَبِيًّا لِّيُنذِرَ ٱلَّذِينَ ظَلَمُوا۟ وَبُشْرَىٰ لِلْمُحْسِنِينَ

And before it was the scripture of Moses to lead and as a mercy. And this is a confirming Book in an Arabic tongue to warn those who have wronged and as good tidings to the doers of good.

Translation: Saheeh International

Tafsir

Yet before it that is before the Qur’ān there was the Book of Moses that is the Torah as a guidepost and a mercy for those who believed in it imāman wa-rahmatan are two circumstantial qualifiers and this Qur’ān is a Book that confirms scriptures before it in the Arabic tongue lisānan ‘arabiyyan is a circumstantial …

Excerpt from Tafsir al-Jalalayn, commentary on 46:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.