He made the categories of zakat eight because of the good of the world in it, as it is in what the bodies provide of food and fulfilling needs in general, and in these two matters the good of the world is that they are the bearers of the eight throne, and the throne which is the kingdom is carried for them, so from that fact it was in eight. There is consensus on categories, and anything other than them that is disputed, it refers to them, and since the throne was the king and the bearers of this throne, which is about us, these eight categories were the bearers of it, and this amount of money expressed in zakat was like the wage for carrying them .