Surah Maryam 19:97

فَإِنَّمَا يَسَّرْنَـٰهُ بِلِسَانِكَ لِتُبَشِّرَ بِهِ ٱلْمُتَّقِينَ وَتُنذِرَ بِهِۦ قَوْمًا لُّدًّا

So, [O Muḥammad], We have only made it [i.e., the Qur’ān] easy in your tongue [i.e., the Arabic language] that you may give good tidings thereby to the righteous and warn thereby a hostile people.

Translation: Saheeh International

Tafsir

Indeed We have made it easy namely the Qur’ān in your tongue only that you may bear good tidings therewith to the God-fearing those who will be prosperous because of their faith and warn threaten therewith a folk who are contumacious luddan the accusative plural of aladd in other words extremely disputatious using …

Excerpt from Tafsir al-Jalalayn, commentary on 19:97, via Quran.com. The reader has the full commentary and 9 more tafsirs.