Hazrat Abdullah bin Abi Qatadah (may Allah have mercy on him) narrates that Sayyiduna Abu Qatadah (may Allah be pleased with him) came to me on Friday while I was performing ghusl (ritual bath). He asked, "Are you performing ghusl due to janabah (major ritual impurity)?" I replied, "Yes." He then said, "Then perform another ghusl. Indeed, I heard the Messenger of Allah (peace and blessings be upon him) say: 'Whoever performs ghusl on Friday, he remains pure and clean until the next Friday.'" Imam Abu Bakr (may Allah have mercy on him) says that this hadith is ghareeb (rare/strange). No one except Harun has narrated it.