﴿ وَجَعَلَهَا كَلِمَةًۢ بَاقِيَةًۭ فِى عَقِبِهِۦ لَعَلَّهُمْ يَرْجِعُونَ ﴾

“And he uttered this as a word destined to endure among those who would come after him, so that they might [always] return [to it].”

Please check ayah 43:35 for complete tafsir.