"It is no objection to shooting arrows or other missiles against the infidels that there may chance to be among them a Muslim in the way either of bondage or of traffic, because the shooting of arrows and so forth among the infidels remedies a general evil in the repulsion thereof from the whole body of Muslims, whereas the slaying of a Muslim slave or a trader is only a particular evil, and to repel a general evil a particular evil must be adopted, and also because it seldom happens that the strongholds of the infidels are destitute of Muslims, since it is most probable that there are Muslims residing in them, either in the way of bondage or of traffic, and hence, if the use of missile weapons were prohibited on account of these Muslims, war would be obstructed. If the infidels in time of battle should make shields of Muslim children, or of Muslims, who are prisoners in their hands, yet there is no need on that account to refrain from the use of missile weapons, for the reason already mentioned. It is requisite, however, that the Muslims in using such weapons aim at the infidels, and not at the children or the Muslim captives, because, as it is impossible in shooting to distinguish precisely between them and the infidels, the person who discharges the weapon must make this distinction in his intention and design by aiming at the infidels, and not at the others, since this much is practicable, and the distinction must be made as far as is practicable."