Sayyidah Asma bint Abi Bakr (may Allah be pleased with her) narrates that the Companions (may Allah be pleased with them) during the time of the Messenger of Allah (peace be upon him) used to give Sadaqat al-Fitr with that mudd with which the people of Madinah measured food grains, or with that sa’ with which all the people of Madinah transacted food grains.