"Malik said, "The sunna is that there is no jizya due from women or children of people of the Book, and that jizya is only taken from men who have reached puberty. The people of dhimma and the magians do not have to pay any zakat on their palms or their vines or their crops or their livestock. This is because zakat is imposed on the muslims to purify them and to be given back to their poor, whereas jizya is imposed on the people of the Book to humble them. As long as they are in the country they have agreed to live in, they do not have to pay anything on their property except the jizya. If, however, they trade in muslim countries, coming and going in them, a tenth is taken from what they invest in such trade. This is because jizya is only imposed on them on conditions, which they have agreed on, namely that they will remain in their own countries, and that war will be waged for them on any enemy of theirs, and that if they then leave that land to go anywhere else to do business they will haveto pay a tenth. Whoever among them does business with the people of Egypt, and then goes to Syria, and then does business with the people of Syria and then goes to Iraq and does business with them and then goes on to Madina, or Yemen, or other similar places, has to pay a tenth."