Surah Ya-Sin, Verse 6

لِتُنذِرَ قَوۡمٗا مَّآ أُنذِرَ ءَابَآؤُهُمۡ فَهُمۡ غَٰفِلُونَ٦

litundhira qawman mā undhira ābāuhum fahum ghāfilūna

That you may warn a people whose forefathers were not warned, so they are unaware.