It is narrated from Sayyiduna Ali (may Allah be pleased with him) that once, in the presence of the Prophet (peace and blessings be upon him), Sayyidah Fatimah (may Allah be pleased with her), Sayyiduna Abbas, and Sayyiduna Zaid bin Harithah (may Allah be pleased with them) were also present. Sayyiduna Abbas (may Allah be pleased with him) said, "O Messenger of Allah! I have now become old, my bones have become weak, and my responsibilities have increased. If you could give me some measure of grain and wheat, it would suffice for me." The Prophet (peace and blessings be upon him) said, "Alright, it will be given." Sayyidah Fatimah (may Allah be pleased with her) submitted, "O Messenger of Allah! If you deem it appropriate, the order you have given for your uncle, please give the same for us as well." The Prophet (peace and blessings be upon him) said, "Alright, it will be given." Then Sayyiduna Zaid bin Harithah said, "O Messenger of Allah! You had granted me a piece of land from which I used to make a living, but then you took that land back. If you consider it appropriate, please return it to me." He said, "Alright, it will be done." After that, I submitted, "O Messenger of Allah! Allah has fixed for us the right of khums in the Noble Qur'an. If you consider it appropriate, appoint me as its supervisor so that I may distribute it during your blessed life, and after you, no one may dispute with me regarding it?" The Prophet (peace and blessings be upon him) said, "Alright, you will be appointed." Thus, the Prophet (peace and blessings be upon him) appointed me as its supervisor, and I continued to distribute it during the life of the Prophet (peace and blessings be upon him). Sayyiduna Abu Bakr (may Allah be pleased with him) also kept me as its supervisor during his time, and I continued to distribute it during his life as well. Sayyiduna Umar (may Allah be pleased with him) also kept me in charge of it, and I continued to distribute it, but when it was the last year of Sayyiduna Umar Farooq (may Allah be pleased with him), the supervision was taken from me. At that time, a lot of wealth had come to him (and he wanted to adopt a different method).