Maryam 19:97

Fa-innama yassarnahu bilisanikalitubashshira bihi almuttaqeena watunthira bihi qawmanludda

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.

So We have made it (the Qur’ān) easy through your tongue, so that you give with it the good news to the God-fearing, and warn with it an obstinate people.