Quran 40:30

وَقَالَ ٱلَّذِىٓ ءَامَنَ يَٰقَوْمِ إِنِّىٓ أَخَافُ عَلَيْكُم مِّثْلَ يَوْمِ ٱلْأَحْزَابِ

And he who believed said, "O my people, indeed I fear for you [a fate] like the day of the companies -

Translation · Saheeh International