Surah Al-Hijr, Verse 8

مَا نُنَزِّلُ ٱلۡمَلَٰٓئِكَةَ إِلَّا بِٱلۡحَقِّ وَمَا كَانُوٓاْ إِذٗا مُّنظَرِينَ٨

mā nunazzilu l-malāikata illā bil-ḥaqi wamā kānū idhan munẓarīna

We do not send down the angels except with truth; and they [i.e., the disbelievers] would not then be reprieved.