Al-Mursalat 77:8

فَالْمُلْقِيَاتِ ذِكْرًا

And those [angels] who deliver a message

عُذْرًا أَوْ نُذْرًا

As justification or warning,

إِنَّمَا تُوعَدُونَ لَوَاقِعٌ

Indeed, what you are promised is to occur.

وَإِذَا السَّمَاءُ فُرِجَتْ

And when the heaven is opened

وَإِذَا الْجِبَالُ نُسِفَتْ

And when the mountains are blown away

وَإِذَا الرُّسُلُ أُقِّتَتْ

And when the messengers' time has come...