52:12
ٱلَّذِينَ هُمْ فِى خَوْضٍ يَلْعَبُونَ
Who are in [empty] discourse amusing themselves.
The Mount
ٱلَّذِينَ هُمْ فِى خَوْضٍ يَلْعَبُونَ
Who are in [empty] discourse amusing themselves.
Nearby ayahs help place verse 52:12 in sequence and meaning.
وَتَسِيرُ ٱلْجِبَالُ سَيْرًا
And the mountains will pass on, departing -
فَوَيْلٌ يَوْمَئِذٍ لِّلْمُكَذِّبِينَ
Then woe, that Day, to the deniers,
يَوْمَ يُدَعُّونَ إِلَىٰ نَارِ جَهَنَّمَ دَعًّا
The Day they are thrust toward the fire of Hell with a [violent] thrust, [its angels will say],
هَـٰذِهِ ٱلنَّارُ ٱلَّتِى كُنتُم بِهَا تُكَذِّبُونَ
"This is the Fire which you used to deny.