Surah Al-Anfal (The Spoils of War), Verse 48

وَاِذْ زَیَّنَ لَهُمُ الشَّیْطٰنُ اَعْمَالَهُمْ وَقَالَ لَا غَالِبَ لَكُمُ الْیَوْمَ مِنَ النَّاسِ وَاِنِّیْ جَارٌ لَّكُمْ فَلَمَّا تَرَآءَتِ الْفِئَتٰنِ نَكَصَ عَلٰی عَقِبَیْهِ وَقَالَ اِنِّیْ بَرِیْٓءٌ مِّنْكُمْ اِنِّیْۤ اَرٰی مَا لَا تَرَوْنَ اِنِّیْۤ اَخَافُ اللّٰهَ وَاللّٰهُ شَدِیْدُ الْعِقَابِ 

Wa iz zaiyana lahumush shaitaanu a'maalahum wa qaala laa ghaaliba lakumul yawma minan naasi wa innee jaarul lakum falammaa taraaa'atil fi'ataani nakasa 'alaa aqibaihi wa qaala innee bareee'um minkum innee araa maa laa tarawna inneee akhaaful laah; wallaahu shadeedul 'iqaab

“Remember Satan made their (sinful) acts seem alluring to them, and said: "No one among men can overcome you this day, while I am near to you": But when the two forces came in sight of each other, he turned on his heels, and said: "Lo! I am clear of you; lo! I see what ye see not; Lo! I fear Allah: for Allah is strict in punishment."”

Quran 8:48 (Yusuf Ali Translation)