﴿ فَإِنَّمَا يَسَّرْنَٰهُ بِلِسَانِكَ لِتُبَشِّرَ بِهِ ٱلْمُتَّقِينَ وَتُنذِرَ بِهِۦ قَوْمًۭا لُّدًّۭا ﴾

“and only to this end have We made this [divine writ] easy to understand, in thine own tongue, [O Prophet,] so that thou might convey thereby a glad tiding to the God-conscious, and warn thereby those who are given to [futile] contention:”

Please check ayah 19:98 for complete tafsir.