“This is concerning my question before abu ‘ Abd Allah (a.s.), about the case of a man who had a large town in which he had taxpayer infidels from whom al-Sultan collected taxes and they paid to him fifty or thirty or more or less, each one. The owner of the town reached a settlement for them with al-Sultan and he collected more from them than what he paid to al-Sultan. He (the Imam) said, ‘It is unlawful.”’