Dr. Mustafa Khattab, the Clear Quran - Surah Ya-Sin, ayah 6

Translation of Surah Ya-Sin, ayah 6 (36:6)

لِتُنذِرَ قَوۡمٗا مَّآ أُنذِرَ ءَابَآؤُهُمۡ فَهُمۡ غَٰفِلُونَ ٦
so that you may warn a people whose forefathers were not warned, and so are heedless.