Sura 40 Ghafir (The Forgiver), ayah 30

1. وَقَالَ الَّذِي آمَنَ يَا قَوْمِ إِنِّي أَخَافُ عَلَيْكُمْ مِثْلَ يَوْمِ الْأَحْزَابِ

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

   40:30

Translation: Saheeh International