H 357 - Husain Ibn Ubaidullah narrates on the authority of Salama Ibn Muhammad that: Shaykh Husain Ibn Rauh sent the book of Kitabul Tadib to Qom and wrote to a group of jurists about it and asked them to examine the book and see whether there was anything disagreeable in it. They wrote to him, “All of it is correct and there is nothing in it to be differed with, except the assertion with respect to the amount of fitra to be half of a saa (a cubic measure) of food and food before us is the like of barley from every one saa.”