﴿ وَمِن قَبْلِهِۦ كِتَٰبُ مُوسَىٰٓ إِمَامًۭا وَرَحْمَةًۭ ۚ وَهَٰذَا كِتَٰبٌۭ مُّصَدِّقٌۭ لِّسَانًا عَرَبِيًّۭا لِّيُنذِرَ ٱلَّذِينَ ظَلَمُوا۟ وَبُشْرَىٰ لِلْمُحْسِنِينَ ﴾

“And yet, before this there was the revelation of Moses, a guide and a [sign of God’s] grace; and this [Qur’an] is a divine writ confirming the truth [of the Torah] in the Arabic tongue, to warn those who are bent on evildoing, and [to bring] a glad tiding to the doers of good:”

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 qualifier referring to the subject of musaddiqun ‘that confirms’ to warn those who do wrong the idolaters of Mecca and it is good tidings for the virtuous the believers.