﴿ فَإِذَا ٱنشَقَّتِ ٱلسَّمَآءُ فَكَانَتْ وَرْدَةًۭ كَٱلدِّهَانِ ﴾

“And when the sky is rent asunder and becomes red like [burning] oil”

And when the heaven is split open when it becomes open with many gates in preparation for the descent of the angels and it turns crimson wardatan literally ‘a rose’ in other words red like this rose like tanned leather red skins in contrast to its the heaven’s usual appearance the response to idhā ‘when’ is along the lines of fa-mā a‘zama’l-hawli ‘How great will be the terror then!’.