Grading: (1) Its chain is weak because of the "weakness" of 'Abd Allah bin al-Mu'ammal and the "disagreement" over his narration.
Technical note / Defect ('illah): It is narrated from him in several ways: sometimes he narrates it from Ibn Abi Mulaykah from 'A'ishah (as in the author's chain here); sometimes from Abu al-Zubayr from Jabir (as in the next narration); sometimes he adds a person named "Abu Ayyub" between himself and Ibn Abi Mulaykah; and sometimes he narrates it from Abu al-Zubayr in "mursal" form, without mentioning Jabir. Ibn Abi Mulaykah: he is "'Abd Allah bin 'Ubayd Allah".

Reference / Source: And it is with the author in "Fada'il Fatimah" (8) and (88).

Reference / Source: And he recorded it in (89) via al-Fadl bin al-Sha'rani, from Ahmad bin Hanbal, from Musa bin Dawud, with this same chain.

Reference / Source: And Ibn 'Asakir [3/ 158] narrated it via Hanbal bin Ishaq, from Ahmad bin Hanbal, from Musa bin Dawud, from 'Abd Allah bin al-Mu'ammal, from Abu Ayyub, from Ibn Abi Mulaykah, from 'A'ishah.

Technical note / Narrator: Among those who narrate from Ibn Abi Mulaykah is a man named "Sulayman bin Dawud al-Qurashi", whose kunyah is "Abu Ayyub", and he was a highly esteemed thiqah (trustworthy narrator); perhaps it is he.

Note / Clarification: And it will come shortly through various routes from 'Abd Allah bin al-Mu'ammal, "from Abu al-Zubayr, from Jabir".

Important point: And what is narrated from 'A'ishah (may Allah be pleased with her) under nos. (4817) and (4818), that the period between the death of the Prophet (peace and blessings be upon him) and the death of his daughter Fatimah was "six months", is what is authentically established from 'A'ishah.