إِنَّ هَـٰذَا مَا كُنتُم بِهِۦ تَمْتَرُونَ Qur’an Ad-Dukhan (44:50)Inna h atha m a kuntum bihi tamtaroon a
I.e., the continuation of life after death.
When the Punishment becomes a realised fact, how foolish will those look who doubted whether there would be a Hereafter?