It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "O Banu Talhah! Take it permanently and as an inheritance; no one will take it away from you except one who is a wrongdoer." That is: the custodianship and keeping of the keys of the Ka'bah.
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ibn Abi Mulaykah (may Allah have mercy on him) except Abdullah bin al-Mu'ammal (may Allah have mercy on him), and Ma'n bin Isa (may Allah have mercy on him) is alone in narrating it from him."
Hadith Referenceالمعجم الأوسط / باب الألف / 488
Hadith Gradingمحدثین:غير محفوظ، فيه عبد الله بن المؤمل ضعيف
Hadith Takhrij«قال ابن عدي: غير محفوظ «الكامل في الضعفاء، ج 5، ص 226»» «قال ابن عدي: عامة ما يرويه عبد الله بن بن المؤمل الضعف عليه بين «الكامل في الضعفاء، ج 5، ص 226»» «أخرجه الطبراني فى «الكبير» برقم: 11234»