Surah Al-Ahqaf (The Sand-Hills), Verse 12

وَمِنْ قَبْلِهٖ كِتٰبُ مُوْسٰۤی اِمَامًا وَّرَحْمَةً وَهٰذَا كِتٰبٌ مُّصَدِّقٌ لِّسَانًا عَرَبِیًّا لِّیُنْذِرَ الَّذِیْنَ ظَلَمُوْا وَبُشْرٰی لِلْمُحْسِنِیْنَ ۟

Wa min qablihee kitaabu Moosaaa imaamanw-wa rahmah; wa haazaa Kitaabum musad diqul lisaanan 'Arabiyyal liyunziral lazeena zalamoo wa bushraa lilmuhsineen

“And before this, was the Book of Moses as a guide and a mercy: And this Book confirms (it) in the Arabic tongue; to admonish the unjust, and as Glad Tidings to those who do right.”

Quran 46:12 (Yusuf Ali Translation)