Al-Anfal - 8:60

وَأَعِدُّواْ لَهُم مَّا اسْتَطَعْتُم مِّن قُوَّةٍ وَمِن رِّبَاطِ الْخَيْلِ تُرْهِبُونَ بِهِ عَدْوَّ اللّهِ وَعَدُوَّكُمْ وَآخَرِينَ مِن دُونِهِمْ لاَ تَعْلَمُونَهُمُ اللّهُ يَعْلَمُهُمْ وَمَا تُنفِقُواْ مِن شَيْءٍ فِي سَبِيلِ اللّهِ يُوَفَّ إِلَيْكُمْ وَأَنتُمْ لاَ تُظْلَمُونَ
[8:60]
And prepare against them what force you can and horses tied at the frontier, to frighten thereby the enemy of Allah and your enemy and others besides them, whom you do not know (but) Allah knows them; and whatever thing you will spend in Allah's way, it will be paid back to you fully and you shall not be dealt with unjustly.
Against them make ready your strength to the utmost of your power, including steeds of war, to strike terror into (the hearts of) the enemies, of Allah and your enemies, and others besides, whom ye may not know, but whom Allah doth know. Whatever ye shall spend in the cause of Allah, shall be repaid unto you, and ye shall not be treated unjustly.
Make ready for them all thou canst of (armed) force and of horses tethered, that thereby ye may dismay the enemy of Allah and your enemy, and others beside them whom ye know not. Allah knoweth them. Whatsoever ye spend in the way of Allah it will be repaid to you in full, and ye will not be wronged.