Surah At-Taubah (The Repentance), Verse 123

یٰۤاَیُّهَا الَّذِیْنَ اٰمَنُوْا قَاتِلُوا الَّذِیْنَ یَلُوْنَكُمْ مِّنَ الْكُفَّارِ وَلْیَجِدُوْا فِیْكُمْ غِلْظَةً وَاعْلَمُوْۤا اَنَّ اللّٰهَ مَعَ الْمُتَّقِیْنَ ۟

Yaaa aiyuhal lazeena aamanoo qaatilul lazeena yaloonakum minal kuffaari walyajidoo feekum ghilzah; wa'lamooo annal laaha ma'al muttaqeen

“O ye who believe! fight the unbelievers who gird you about, and let them find firmness in you: and know that Allah is with those who fear Him.”

Quran 9:123 (Yusuf Ali Translation)