Chapter 3, Verse 200, The family of Imran
سورة آل عمران
يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ ٱصۡبِرُواْ وَصَابِرُواْ وَرَابِطُواْ وَٱتَّقُواْ ٱللَّهَ لَعَلَّكُمۡ تُفۡلِحُونَ
O you who believe! Endure and be more patient (than your enemy), and guard your territory by stationing army units permanently at the places from where the enemy can attack you, and fear Allah, so that you may be successful.