Surah Al-Anfal · 8:60

وَأَعِدُّوا۟ لَهُم مَّا ٱسْتَطَعْتُم مِّن قُوَّةٍۢ وَمِن رِّبَاطِ ٱلْخَيْلِ تُرْهِبُونَ بِهِۦ عَدُوَّ ٱللَّهِ وَعَدُوَّكُمْ وَءَاخَرِينَ مِن دُونِهِمْ لَا تَعْلَمُونَهُمُ ٱللَّهُ يَعْلَمُهُمْ ۚ وَمَا تُنفِقُوا۟ مِن شَىْءٍۢ فِى سَبِيلِ ٱللَّهِ يُوَفَّ إِلَيْكُمْ وَأَنتُمْ لَا تُظْلَمُونَ

“Do not let those disbelievers think they are not within reach. They will have no escape. Prepare against them what you [believers] can of [military] power and cavalry to deter Allah's enemies and your enemies as well as other enemies unknown to you but known to Allah. Whatever you spend in the cause of Allah will be paid to you in full, and you will not be wronged.”