Al-Kāfi #631“Abu ‘Abd Allah (a.s.), has said, ‘It is not proper to sell with a Sa‘ (a certain measuring device) which is not in use in the city...
Al-Kāfi #632“Abu ‘Abd Allah (a.s.), has said, ‘It is not lawful for one to sell with a Sa‘ which is not in use in a city. A man may hire a camel man and...