Dr. Mustafa Khattab, the Clear Quran - Surah Al-Mursalat, ayah 50

Translation of Surah Al-Mursalat, ayah 50 (77:50)

فَبِأَيِّ حَدِيثِۭ بَعۡدَهُۥ يُؤۡمِنُونَ ٥٠
So what message after this ˹Quran˺ would they believe in?