اَنّٰى لَهُمُ الذِّكْرٰى وَقَدْ جَاۤءَهُمْ رَسُوْلٌ مُّبِيْنٌۙ ( الدخان: ١٣ )
Annaa lahumuz zikraa wa qad jaaa'ahum Rasoolum mubeen (ad-Dukhān 44:13)
How will there be for them a reminder [at that time]? And there had come to them a clear Messenger. (Ad-Dukhan  : 13)
1 Mufti Taqi Usmani
How will they take lesson, while there has already come to them a messenger making things clear?