أَعُوْذُ بِاللّهِ مِنَ الشَّيْطَانِ الرَّجِيْمِ
بِسْمِ اللّهِ الرَّحْمنِ الرَّحِيْمِ

وَمَا كَانَ الْمُؤْمِنُونَ لِيَنْفِرُوا كَافَّةً ۚ فَلَوْلَا نَفَرَ مِنْ كُلِّ فِرْقَةٍ مِنْهُمْ طَائِفَةٌ لِيَتَفَقَّهُوا فِي الدِّينِ وَلِيُنْذِرُوا قَوْمَهُمْ إِذَا رَجَعُوا إِلَيْهِمْ لَعَلَّهُمْ يَحْذَرُونَ ( سورة التوبة : 122)

[122] And it is not (proper) for the believers to go out to fight (Jihâd) all together. Of every troop of them, a party only should go forth, that they (who are left behind) may get instructions in (Islâmic) religion, and that they may warn their people when they return to them, so that they may beware (of evil).