Surah Al Mu'minun Tafseer

فَذَرْهُمْ فِي غَمْرَتِهِمْ

So, leave them in their error,

meaning their misguidance,

حَتَّى حِينٍ

for a time.

means, until the appointed time of their destruction comes.

This is like the Ayah:

فَمَهِّلِ الْكَـفِرِينَ أَمْهِلْهُمْ رُوَيْداً

So give a respite to the disbelievers; deal gently with them for a while. (86:17)

And Allah says:

ذَرْهُمْ يَأْكُلُواْ وَيَتَمَتَّعُواْ وَيُلْهِهِمُ الاٌّمَلُ فَسَوْفَ يَعْلَمُونَ

Leave them to eat and enjoy, and let them be preoccupied with (false) hope. They will come to know! (15:3)

أَيَحْسَبُونَ أَنَّمَا نُمِدُّهُم بِهِ مِن مَّالٍ وَبَنِينَ