Surah Ghafar (The Forgiver), Verse 30

وَقَالَ الَّذِیْۤ اٰمَنَ یٰقَوْمِ اِنِّیْۤ اَخَافُ عَلَیْكُمْ مِّثْلَ یَوْمِ الْاَحْزَابِ ۟

Wa qaalal lazee aamana yaa qawmi inneee akhaafu 'alaikum misla yawmil Ahzaab

“Then said the man who believed: "O my people! Truly I do fear for you something like the Day (of disaster) of the Confederates (in sin)!-”

Quran 40:30 (Yusuf Ali Translation)