The preparation of the Islamic army takes place from the Bait al-Mal since the wealth of the Bait al-Mal is disposed for the interests of Muslims. So among that which it is disposed for is preparing fighters. Accordingly it is obliged to organise the fighters in one Islamic army under the leadership of the Khalifah however numerous the divisions of the army and the military aspects of its organisation. They must all be under one flag however numerous its banners. The preparation of the whole army is from the Bait al-Mal not from elsewhere; if anyone wishes to prepare any of the fighters, despite the presence of the Bait al-Mal, this is paid to the Bait al-Mal. Preparation takes place from it for everything small or big for the army. If there is no money in Bait al-Mal and there is urgent need to prepare the army to defend the Muslims, it is upon the Khalifah to oblige the amount required for this is what is obligatory upon all Muslims. If there does exist money in Bait al-Mal from the permanent revenues of Bait al-Mal, it is used for this. If not, its obligation falls upon the Muslims’ so the Khalifah takes it from the Ummah to undertake its expenses for the army and its preparation. What is spent in preparing the army is from the money spent in the way of Allah (swt) whether the army was in a state of war or not, as jihad is continuous till the Day of Judgement and preparing the army with all that is necessary for fighting is continuous until the Day of Judgement.