وَأَعِدُّوا لَهُم مَّا اسْتَطَعْتُم مِّن قُوَّةٍ وَمِن رِّبَاطِ الْخَيْلِ تُرْهِبُونَ بِهِ عَدُوَّ اللَّهِ وَعَدُوَّكُمْ وَآخَرِينَ مِن دُونِهِمْ لَا تَعْلَمُونَهُمُ اللَّهُ يَعْلَمُهُمْ ۚ وَمَا تُنفِقُوا مِن شَيْءٍ فِي سَبِيلِ اللَّهِ يُوَفَّ إِلَيْكُمْ وَأَنتُمْ لَا تُظْلَمُونَ (60)
(8:60) Make ready for an encounter against them all the forces and well-readied horses you can muster *44 that you may overawe the enemies of Allah and your own enemies and others besides them of whom you are unaware but of whom Allah is aware. Whatever you may spend in the cause of Allah shall be fully repaid to you, and you shall not be wronged.
*44). Muslims should he equipped with military resources and should have a standing army in a state of preparedness, in order that it may be used when needed. Never should it happen that the Muslims are caught unawares and have to hurriedly look around right and left to build up their defences and collect arms and supplies in order to meet the challenge of the enemy. For then it might be too late and the enemy might have accomplished its purpose.